Year	2004-2006 = 100
1961	34.94
1962	26.72
1963	32.38
1964	38.69
1965	36.63
1966	37.02
1967	34.04
1968	34.71
1969	37.35
1970	37.77
1971	47.76
1972	46.37
1973	44.66
1974	43.54
1975	37.85
1976	40.16
1977	43.98
1978	59.12
1979	65.52
1980	78.78
1981	72.3
1982	70.28
1983	72.99
1984	71.92
1985	84.57
1986	85.06
1987	85.22
1988	85.24
1989	73.94
1990	77.26
1991	92.78
1992	81.59
1993	93.28
1994	93.75
1995	83.93
1996	81.03
1997	79.59
1998	78.94
1999	88.96
2000	89.76
2001	94.45
2002	85.31
2003	97.51
2004	98.26
2005	100.72
2006	101.02
2007	91.41
2008	92.46
2009	85.27
2010	39.11
2011	59.36
2012	53.86
2013	50.86
2014	50.87
2015	34.33
2016	32.64