Type of data	Periodo	Total
Annual average index	2001	162,073
Annual average index	2000	155,472
Annual average index	1999	149,842
Annual average index	1998	144,736
Annual average index	1997	138,003
Annual average index	1996	130,009
Annual average index	1995	120,968
Annual average index	1994	114,647
Annual average index	1993	108,574
Annual average index	1992	99,481
Annual average index	1991	91,796
Annual average index	1990	84,276
Annual average index	1989	77,708
Annual average index	1988	71,221
Annual average index	1987	66,853
Annual average index	1986	63,522
Annual average index	1985	59,079
Annual average index	1984	55,39
Annual average index	1983	52,447
Annual average index	1982	48,304
Annual average index	1981	43,084
Annual average index	1980	38,034
Annual average index	1979	33,942
Annual average index	1978	29,899
Annual average index	1977	26,549
Annual average index	1976	23,418
Annual average index	1975	21,09
Annual average index	1974	18,504
Annual average index	1973	16,397
Annual average index	1972	14,87
Annual average index	1971	14,148
Annual average index	1970	13,359
Annual average index	1969	12,739
Annual average index	1968	12,57
Annual average index	1967	11,77
Annual average index	1966	10,811
Annual average index	1965	10,024
Annual average index	1964	9,075
Annual average index	1963	8,59
Annual average index	1962	8,24
Annual average index	1961	7,741
Variation of the annual average	2001	4,2
Variation of the annual average	2000	3,8
Variation of the annual average	1999	3,5
Variation of the annual average	1998	4,9
Variation of the annual average	1997	6,1
Variation of the annual average	1996	7,5
Variation of the annual average	1995	5,5
Variation of the annual average	1994	5,6
Variation of the annual average	1993	9,1
Variation of the annual average	1992	8,4
Variation of the annual average	1991	8,9
Variation of the annual average	1990	8,5
Variation of the annual average	1989	9,1
Variation of the annual average	1988	6,5
Variation of the annual average	1987	5,2
Variation of the annual average	1986	7,5
Variation of the annual average	1985	6,7
Variation of the annual average	1984	5,6
Variation of the annual average	1983	8,6
Variation of the annual average	1982	12,1
Variation of the annual average	1981	13,3
Variation of the annual average	1980	12,1
Variation of the annual average	1979	13,5
Variation of the annual average	1978	12,6
Variation of the annual average	1977	13,4
Variation of the annual average	1976	11
Variation of the annual average	1975	14
Variation of the annual average	1974	12,9
Variation of the annual average	1973	10,3
Variation of the annual average	1972	5,1
Variation of the annual average	1971	5,9
Variation of the annual average	1970	4,9
Variation of the annual average	1969	1,3
Variation of the annual average	1968	6,8
Variation of the annual average	1967	8,9
Variation of the annual average	1966	7,8
Variation of the annual average	1965	10,5
Variation of the annual average	1964	5,6
Variation of the annual average	1963	4,3
Variation of the annual average	1962	6,4
Variation of the annual average	1961	""