Sectors/unit	years	Total
Total	2001	125,750
Total	2000	120,618
Total	1999	102,238
Total	1998	97,098
Total	1997	87,150
Total	1996	87,264
Total	1995	79,987
Total	1994	80,399
Total	1993	75,734
Total	1992	73,320
Total	1991	72,406
Total	1990	69,684
Total	1989	63,155
Total	1988	54,807
Total	1987	48,486
Total	1986	45,261
Total	1985	40,654
Total	1984	39,287
Total	1983	36,171
Total	1982	35,531
Total	1981	36,221
Total	1980	35,496
Total	1979	30,164
Total	1978	29,685
Total	1977	..
Total	1976	..
Total	1975	..
Total	1974	23,921
Total	1973	21,221
Total	1972	23,609
Total	1971	21,609
Total	1970	16,309
Total	1969	14,638
Total	1968	..
Total	1967	12,934
Total	1966	..
Total	1965	..
Total	1964	..
Public Administration: Total	2001	23,468
Public Administration: Total	2000	22,400
Public Administration: Total	1999	22,283
Public Administration: Total	1998	20,170
Public Administration: Total	1997	19,189
Public Administration: Total	1996	17,866
Public Administration: Total	1995	17,153
Public Administration: Total	1994	17,546
Public Administration: Total	1993	17,266
Public Administration: Total	1992	16,678
Public Administration: Total	1991	17,519
Public Administration: Total	1990	17,170
Public Administration: Total	1989	14,606
Public Administration: Total	1988	13,747
Public Administration: Total	1987	12,643
Public Administration: Total	1986	11,636
Public Administration: Total	1985	10,031
Public Administration: Total	1984	10,695
Public Administration: Total	1983	10,213
Public Administration: Total	1982	10,595
Public Administration: Total	1981	11,805
Public Administration: Total	1980	11,400
Public Administration: Total	1979	11,115
Public Administration: Total	1978	11,041
Public Administration: Total	1977	..
Public Administration: Total	1976	11,553
Public Administration: Total	1975	11,438
Public Administration: Total	1974	9,423
Public Administration: Total	1973	8,886
Public Administration: Total	1972	12,063
Public Administration: Total	1971	11,661
Public Administration: Total	1970	9,058
Public Administration: Total	1969	8,579
Public Administration: Total	1968	..
Public Administration: Total	1967	8,027
Public Administration: Total	1966	..
Public Administration: Total	1965	..
Public Administration: Total	1964	..
Public Administration: %	2001	19
Public Administration: %	2000	19
Public Administration: %	1999	22
Public Administration: %	1998	21
Public Administration: %	1997	22
Public Administration: %	1996	20
Public Administration: %	1995	22
Public Administration: %	1994	22
Public Administration: %	1993	23
Public Administration: %	1992	23
Public Administration: %	1991	24
Public Administration: %	1990	24
Public Administration: %	1989	23
Public Administration: %	1988	25
Public Administration: %	1987	26
Public Administration: %	1986	26
Public Administration: %	1985	25
Public Administration: %	1984	27
Public Administration: %	1983	28
Public Administration: %	1982	30
Public Administration: %	1981	33
Public Administration: %	1980	32
Public Administration: %	1979	37
Public Administration: %	1978	37
Public Administration: %	1977	..
Public Administration: %	1976	..
Public Administration: %	1975	..
Public Administration: %	1974	40
Public Administration: %	1973	42
Public Administration: %	1972	51
Public Administration: %	1971	54
Public Administration: %	1970	56
Public Administration: %	1969	59
Public Administration: %	1968	..
Public Administration: %	1967	62
Public Administration: %	1966	..
Public Administration: %	1965	..
Public Administration: %	1964	..
Higher education: Total	2001	54,623
Higher education: Total	2000	49,470
Higher education: Total	1999	40,626
Higher education: Total	1998	41,041
Higher education: Total	1997	36,843
Higher education: Total	1996	38,956
Higher education: Total	1995	34,330
Higher education: Total	1994	34,642
Higher education: Total	1993	29,839
Higher education: Total	1992	27,553
Higher education: Total	1991	25,360
Higher education: Total	1990	23,654
Higher education: Total	1989	22,500
Higher education: Total	1988	16,912
Higher education: Total	1987	15,100
Higher education: Total	1986	14,305
Higher education: Total	1985	13,763
Higher education: Total	1984	13,570
Higher education: Total	1983	13,053
Higher education: Total	1982	12,022
Higher education: Total	1981	12,410
Higher education: Total	1980	11,793
Higher education: Total	1979	7,138
Higher education: Total	1978	7,053
Higher education: Total	1977	..
Higher education: Total	1976	..
Higher education: Total	1975	..
Higher education: Total	1974	2,655
Higher education: Total	1973	2,398
Higher education: Total	1972	2,860
Higher education: Total	1971	2,325
Higher education: Total	1970	1,560
Higher education: Total	1969	1,282
Higher education: Total	1968	..
Higher education: Total	1967	824
Higher education: Total	1966	..
Higher education: Total	1965	..
Higher education: Total	1964	..
Higher education: %	2001	43
Higher education: %	2000	41
Higher education: %	1999	40
Higher education: %	1998	42
Higher education: %	1997	42
Higher education: %	1996	45
Higher education: %	1995	43
Higher education: %	1994	43
Higher education: %	1993	39
Higher education: %	1992	37
Higher education: %	1991	35
Higher education: %	1990	34
Higher education: %	1989	36
Higher education: %	1988	31
Higher education: %	1987	31
Higher education: %	1986	31
Higher education: %	1985	34
Higher education: %	1984	35
Higher education: %	1983	36
Higher education: %	1982	34
Higher education: %	1981	34
Higher education: %	1980	33
Higher education: %	1979	24
Higher education: %	1978	24
Higher education: %	1977	..
Higher education: %	1976	..
Higher education: %	1975	..
Higher education: %	1974	11
Higher education: %	1973	11
Higher education: %	1972	12
Higher education: %	1971	11
Higher education: %	1970	10
Higher education: %	1969	9
Higher education: %	1968	..
Higher education: %	1967	6
Higher education: %	1966	..
Higher education: %	1965	..
Higher education: %	1964	..
Companies: Total	2001	46,465
Companies: Total	2000	47,055
Companies: Total	1999	38,323
Companies: Total	1998	34,667
Companies: Total	1997	30,023
Companies: Total	1996	29,431
Companies: Total	1995	27,557
Companies: Total	1994	27,321
Companies: Total	1993	27,781
Companies: Total	1992	28,590
Companies: Total	1991	29,151
Companies: Total	1990	28,508
Companies: Total	1989	25,865
Companies: Total	1988	23,678
Companies: Total	1987	20,361
Companies: Total	1986	19,007
Companies: Total	1985	16,860
Companies: Total	1984	15,022
Companies: Total	1983	12,905
Companies: Total	1982	12,914
Companies: Total	1981	12,006
Companies: Total	1980	12,303
Companies: Total	1979	11,911
Companies: Total	1978	11,591
Companies: Total	1977	..
Companies: Total	1976	14,175
Companies: Total	1975	13,199
Companies: Total	1974	11,311
Companies: Total	1973	9,937
Companies: Total	1972	8,686
Companies: Total	1971	7,623
Companies: Total	1970	5,691
Companies: Total	1969	4,777
Companies: Total	1968	..
Companies: Total	1967	4,083
Companies: Total	1966	..
Companies: Total	1965	..
Companies: Total	1964	..
Companies: %	2001	37
Companies: %	2000	39
Companies: %	1999	37
Companies: %	1998	36
Companies: %	1997	35
Companies: %	1996	34
Companies: %	1995	34
Companies: %	1994	34
Companies: %	1993	37
Companies: %	1992	39
Companies: %	1991	40
Companies: %	1990	41
Companies: %	1989	41
Companies: %	1988	43
Companies: %	1987	42
Companies: %	1986	42
Companies: %	1985	41
Companies: %	1984	38
Companies: %	1983	36
Companies: %	1982	36
Companies: %	1981	33
Companies: %	1980	35
Companies: %	1979	39
Companies: %	1978	39
Companies: %	1977	..
Companies: %	1976	..
Companies: %	1975	..
Companies: %	1974	47
Companies: %	1973	47
Companies: %	1972	37
Companies: %	1971	35
Companies: %	1970	35
Companies: %	1969	33
Companies: %	1968	..
Companies: %	1967	32
Companies: %	1966	..
Companies: %	1965	..
Companies: %	1964	..
NPPI: Total	2001	1,195
NPPI: Total	2000	1,693
NPPI: Total	1999	1,005
NPPI: Total	1998	1,220
NPPI: Total	1997	1,095
NPPI: Total	1996	1,011
NPPI: Total	1995	947
NPPI: Total	1994	890
NPPI: Total	1993	848
NPPI: Total	1992	499
NPPI: Total	1991	376
NPPI: Total	1990	352
NPPI: Total	1989	184
NPPI: Total	1988	470
NPPI: Total	1987	382
NPPI: Total	1986	313
NPPI: Total	1985	..
NPPI: Total	1984	..
NPPI: Total	1983	..
NPPI: Total	1982	..
NPPI: Total	1981	..
NPPI: Total	1980	..
NPPI: Total	1979	..
NPPI: Total	1978	..
NPPI: Total	1977	..
NPPI: Total	1976	..
NPPI: Total	1975	..
NPPI: Total	1974	532
NPPI: Total	1973	..
NPPI: Total	1972	..
NPPI: Total	1971	..
NPPI: Total	1970	..
NPPI: Total	1969	..
NPPI: Total	1968	..
NPPI: Total	1967	..
NPPI: Total	1966	..
NPPI: Total	1965	..
NPPI: Total	1964	..
NPPI: %	2001	1
NPPI: %	2000	1
NPPI: %	1999	1
NPPI: %	1998	1
NPPI: %	1997	1
NPPI: %	1996	1
NPPI: %	1995	1
NPPI: %	1994	1
NPPI: %	1993	1
NPPI: %	1992	1
NPPI: %	1991	1
NPPI: %	1990	1
NPPI: %	1989	0
NPPI: %	1988	1
NPPI: %	1987	1
NPPI: %	1986	1
NPPI: %	1985	..
NPPI: %	1984	..
NPPI: %	1983	..
NPPI: %	1982	..
NPPI: %	1981	..
NPPI: %	1980	..
NPPI: %	1979	..
NPPI: %	1978	..
NPPI: %	1977	..
NPPI: %	1976	..
NPPI: %	1975	..
NPPI: %	1974	2
NPPI: %	1973	..
NPPI: %	1972	..
NPPI: %	1971	..
NPPI: %	1970	..
NPPI: %	1969	..
NPPI: %	1968	..
NPPI: %	1967	..
NPPI: %	1966	..
NPPI: %	1965	..
NPPI: %	1964	..