Type of data	Periodo	Total
Annual average index	2001	135,702
Annual average index	2000	131
Annual average index	1999	126,651
Annual average index	1998	123,791
Annual average index	1997	121,561
Annual average index	1996	119,212
Annual average index	1995	115,115
Annual average index	1994	109,975
Annual average index	1993	105,019
Annual average index	1992	100,431
Annual average index	1991	94,813
Annual average index	1990	89,502
Annual average index	1989	83,865
Annual average index	1988	78,532
Annual average index	1987	74,908
Annual average index	1986	71,173
Annual average index	1985	65,419
Annual average index	1984	60,12
Annual average index	1983	54,026
Annual average index	1982	48,162
Annual average index	1981	42,095
Annual average index	1980	36,748
Annual average index	1979	31,799
Annual average index	1978	27,494
Annual average index	1977	22,955
Annual average index	1976	18,432
Annual average index	1975	15,67
Annual average index	1974	13,399
Annual average index	1973	11,582
Annual average index	1972	10,396
Annual average index	1971	9,601
Annual average index	1970	8,871
Annual average index	1969	8,39
Annual average index	1968	8,212
Annual average index	1967	7,825
Annual average index	1966	7,355
Annual average index	1965	6,923
Annual average index	1964	6,115
Annual average index	1963	5,716
Annual average index	1962	5,256
Annual average index	1961	4,972
Variation of the annual average	2001	3,6
Variation of the annual average	2000	3,4
Variation of the annual average	1999	2,3
Variation of the annual average	1998	1,8
Variation of the annual average	1997	2
Variation of the annual average	1996	3,6
Variation of the annual average	1995	4,7
Variation of the annual average	1994	4,7
Variation of the annual average	1993	4,6
Variation of the annual average	1992	5,9
Variation of the annual average	1991	5,9
Variation of the annual average	1990	6,7
Variation of the annual average	1989	6,8
Variation of the annual average	1988	4,8
Variation of the annual average	1987	5,2
Variation of the annual average	1986	8,8
Variation of the annual average	1985	8,8
Variation of the annual average	1984	11,3
Variation of the annual average	1983	12,2
Variation of the annual average	1982	14,4
Variation of the annual average	1981	14,5
Variation of the annual average	1980	15,6
Variation of the annual average	1979	15,7
Variation of the annual average	1978	19,8
Variation of the annual average	1977	24,5
Variation of the annual average	1976	17,6
Variation of the annual average	1975	17
Variation of the annual average	1974	15,7
Variation of the annual average	1973	11,4
Variation of the annual average	1972	8,3
Variation of the annual average	1971	8,2
Variation of the annual average	1970	5,7
Variation of the annual average	1969	2,2
Variation of the annual average	1968	5
Variation of the annual average	1967	6,4
Variation of the annual average	1966	6,2
Variation of the annual average	1965	13,2
Variation of the annual average	1964	7
Variation of the annual average	1963	8,7
Variation of the annual average	1962	5,7
Variation of the annual average	1961	""