Sectors/unit	years	Total
Total	2001	80,081
Total	2000	76,670
Total	1999	61,568
Total	1998	60,269
Total	1997	53,883
Total	1996	51,633
Total	1995	47,342
Total	1994	47,867
Total	1993	43,367
Total	1992	41,681
Total	1991	40,642
Total	1990	37,676
Total	1989	32,914
Total	1988	31,170
Total	1987	26,463
Total	1986	24,525
Total	1985	21,455
Total	1984	20,506
Total	1983	19,453
Total	1982	18,782
Total	1981	19,268
Total	1980	18,323
Total	1979	13,457
Total	1978	13,050
Total	1977	..
Total	1976	..
Total	1975	..
Total	1974	8,492
Total	1973	7,163
Total	1972	8,983
Total	1971	8,014
Total	1970	5,898
Total	1969	5,188
Total	1968	..
Total	1967	4,181
Total	1966	..
Total	1965	..
Total	1964	..
Public Administration: Total	2001	13,345
Public Administration: Total	2000	12,708
Public Administration: Total	1999	11,935
Public Administration: Total	1998	11,021
Public Administration: Total	1997	10,490
Public Administration: Total	1996	9,126
Public Administration: Total	1995	8,359
Public Administration: Total	1994	7,820
Public Administration: Total	1993	7,737
Public Administration: Total	1992	7,660
Public Administration: Total	1991	8,079
Public Administration: Total	1990	7,623
Public Administration: Total	1989	5,864
Public Administration: Total	1988	5,706
Public Administration: Total	1987	4,528
Public Administration: Total	1986	4,060
Public Administration: Total	1985	2,839
Public Administration: Total	1984	2,917
Public Administration: Total	1983	2,872
Public Administration: Total	1982	3,351
Public Administration: Total	1981	3,632
Public Administration: Total	1980	3,536
Public Administration: Total	1979	3,369
Public Administration: Total	1978	3,197
Public Administration: Total	1977	..
Public Administration: Total	1976	3,239
Public Administration: Total	1975	3,278
Public Administration: Total	1974	2,991
Public Administration: Total	1973	2,703
Public Administration: Total	1972	4,499
Public Administration: Total	1971	4,364
Public Administration: Total	1970	3,261
Public Administration: Total	1969	3,037
Public Administration: Total	1968	..
Public Administration: Total	1967	2,238
Public Administration: Total	1966	..
Public Administration: Total	1965	..
Public Administration: Total	1964	..
Public Administration: %	2001	17
Public Administration: %	2000	17
Public Administration: %	1999	19
Public Administration: %	1998	18
Public Administration: %	1997	20
Public Administration: %	1996	18
Public Administration: %	1995	18
Public Administration: %	1994	16
Public Administration: %	1993	18
Public Administration: %	1992	18
Public Administration: %	1991	20
Public Administration: %	1990	20
Public Administration: %	1989	18
Public Administration: %	1988	18
Public Administration: %	1987	17
Public Administration: %	1986	17
Public Administration: %	1985	13
Public Administration: %	1984	14
Public Administration: %	1983	15
Public Administration: %	1982	18
Public Administration: %	1981	19
Public Administration: %	1980	19
Public Administration: %	1979	25
Public Administration: %	1978	24
Public Administration: %	1977	..
Public Administration: %	1976	..
Public Administration: %	1975	..
Public Administration: %	1974	35
Public Administration: %	1973	38
Public Administration: %	1972	50
Public Administration: %	1971	54
Public Administration: %	1970	55
Public Administration: %	1969	59
Public Administration: %	1968	..
Public Administration: %	1967	54
Public Administration: %	1966	..
Public Administration: %	1965	..
Public Administration: %	1964	..
Higher education: Total	2001	46,964
Higher education: Total	2000	42,064
Higher education: Total	1999	33,840
Higher education: Total	1998	34,524
Higher education: Total	1997	30,649
Higher education: Total	1996	30,858
Higher education: Total	1995	27,666
Higher education: Total	1994	28,591
Higher education: Total	1993	24,006
Higher education: Total	1992	22,167
Higher education: Total	1991	20,775
Higher education: Total	1990	18,904
Higher education: Total	1989	17,554
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	2,286
Higher education: Total	1973	2,120
Higher education: Total	1972	2,503
Higher education: Total	1971	1,969
Higher education: Total	1970	1,211
Higher education: Total	1969	987
Higher education: Total	1968	..
Higher education: Total	1967	616
Higher education: Total	1966	..
Higher education: Total	1965	..
Higher education: Total	1964	..
Higher education: %	2001	59
Higher education: %	2000	55
Higher education: %	1999	55
Higher education: %	1998	58
Higher education: %	1997	57
Higher education: %	1996	60
Higher education: %	1995	58
Higher education: %	1994	60
Higher education: %	1993	55
Higher education: %	1992	53
Higher education: %	1991	51
Higher education: %	1990	50
Higher education: %	1989	53
Higher education: %	1988	54
Higher education: %	1987	57
Higher education: %	1986	58
Higher education: %	1985	64
Higher education: %	1984	66
Higher education: %	1983	67
Higher education: %	1982	64
Higher education: %	1981	64
Higher education: %	1980	64
Higher education: %	1979	53
Higher education: %	1978	54
Higher education: %	1977	..
Higher education: %	1976	..
Higher education: %	1975	..
Higher education: %	1974	27
Higher education: %	1973	30
Higher education: %	1972	28
Higher education: %	1971	25
Higher education: %	1970	21
Higher education: %	1969	19
Higher education: %	1968	..
Higher education: %	1967	15
Higher education: %	1966	..
Higher education: %	1965	..
Higher education: %	1964	..
Companies: Total	2001	18,959
Companies: Total	2000	20,869
Companies: Total	1999	15,178
Companies: Total	1998	13,902
Companies: Total	1997	12,009
Companies: Total	1996	11,100
Companies: Total	1995	10,803
Companies: Total	1994	11,070
Companies: Total	1993	11,256
Companies: Total	1992	11,593
Companies: Total	1991	11,622
Companies: Total	1990	11,007
Companies: Total	1989	9,394
Companies: Total	1988	8,552
Companies: Total	1987	6,835
Companies: Total	1986	6,160
Companies: Total	1985	4,853
Companies: Total	1984	4,019
Companies: Total	1983	3,528
Companies: Total	1982	3,409
Companies: Total	1981	3,226
Companies: Total	1980	2,994
Companies: Total	1979	2,950
Companies: Total	1978	2,800
Companies: Total	1977	..
Companies: Total	1976	3,002
Companies: Total	1975	2,760
Companies: Total	1974	2,683
Companies: Total	1973	2,340
Companies: Total	1972	1,981
Companies: Total	1971	1,681
Companies: Total	1970	1,426
Companies: Total	1969	1,164
Companies: Total	1968	..
Companies: Total	1967	1,327
Companies: Total	1966	..
Companies: Total	1965	..
Companies: Total	1964	..
Companies: %	2001	24
Companies: %	2000	27
Companies: %	1999	25
Companies: %	1998	23
Companies: %	1997	22
Companies: %	1996	21
Companies: %	1995	23
Companies: %	1994	23
Companies: %	1993	26
Companies: %	1992	28
Companies: %	1991	29
Companies: %	1990	29
Companies: %	1989	29
Companies: %	1988	27
Companies: %	1987	26
Companies: %	1986	25
Companies: %	1985	23
Companies: %	1984	20
Companies: %	1983	18
Companies: %	1982	18
Companies: %	1981	17
Companies: %	1980	16
Companies: %	1979	22
Companies: %	1978	21
Companies: %	1977	..
Companies: %	1976	..
Companies: %	1975	..
Companies: %	1974	32
Companies: %	1973	33
Companies: %	1972	22
Companies: %	1971	21
Companies: %	1970	24
Companies: %	1969	22
Companies: %	1968	..
Companies: %	1967	32
Companies: %	1966	..
Companies: %	1965	..
Companies: %	1964	..
NPPI: Total	2001	812
NPPI: Total	2000	1,029
NPPI: Total	1999	616
NPPI: Total	1998	822
NPPI: Total	1997	735
NPPI: Total	1996	549
NPPI: Total	1995	514
NPPI: Total	1994	386
NPPI: Total	1993	368
NPPI: Total	1992	261
NPPI: Total	1991	166
NPPI: Total	1990	142
NPPI: Total	1989	102
NPPI: Total	1988	..
NPPI: Total	1987	..
NPPI: Total	1986	..
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	0
NPPI: %	1990	0
NPPI: %	1989	0
NPPI: %	1988	..
NPPI: %	1987	..
NPPI: %	1986	..
NPPI: %	1985	..
NPPI: %	1984	..
NPPI: %	1983	..
NPPI: %	1982	..
NPPI: %	1981	..
NPPI: %	1980	..
NPPI: %	1979	..
NPPI: %	1978	..
NPPI: %	1977	..
NPPI: %	1976	..
NPPI: %	1975	..
NPPI: %	1974	6
NPPI: %	1973	..
NPPI: %	1972	..
NPPI: %	1971	..
NPPI: %	1970	..
NPPI: %	1969	..
NPPI: %	1968	..
NPPI: %	1967	..
NPPI: %	1966	..
NPPI: %	1965	..
NPPI: %	1964	..