Year	2004-2006 = 100
1961	23.01
1962	23.42
1963	24.71
1964	23.78
1965	23.86
1966	24.14
1967	27.59
1968	25.43
1969	27.91
1970	29.15
1971	29.99
1972	30.62
1973	31.31
1974	34.4
1975	35.23
1976	36.19
1977	38.62
1978	39.36
1979	38.75
1980	41.07
1981	46.27
1982	40.48
1983	42.05
1984	37.33
1985	45.03
1986	44.02
1987	40.4
1988	47.7
1989	40.76
1990	39.81
1991	48.55
1992	54.15
1993	50.52
1994	59.55
1995	60.92
1996	66.79
1997	68.38
1998	73.35
1999	74.86
2000	78.67
2001	87.3
2002	89.57
2003	98.6
2004	97.09
2005	100.8
2006	102.11
2007	101.17
2008	101.98
2009	104.24
2010	99.78
2011	106.86