Year	Measure
1960	1685.78843
1961	1763.25991
1962	1791.46132
1963	1924.22901
1964	2176.16887
1965	2241.41569
1966	2286.23117
1967	2188.69351
1968	2319.30024
1969	2374.22858
1970	2457.81727
1971	2393.10726
1972	2617.16106
1973	2662.05079
1974	2882.5525
1975	2772.28212
1976	2928.69314
1977	3055.08108
1978	3031.79931
1979	2834.45803
1980	2886.32401
1981	2849.9856
1982	3012.97139
1983	3076.75867
1984	3251.01174
1985	3448.32835
1986	3464.09605
1987	3452.96268
1988	3609.68051
1989	3846.62615
1990	3854.36603
1991	3763.81448
1992	3808.47722
1993	3967.87134
1994	4055.20055
1995	4053.69059
1996	4131.23633
1997	4258.75678
1998	4162.8692
1999	4307.93043
2000	4430.22786
2001	4407.61886
2002	4337.38052
2003	4197.59386
2004	4239.64575
2005	4095.14309
2006	4047.31802
2007	4054.495
2008	4082.72337
2009	4073.23804
2010	4225.09458
2011	4177.02555
2012	4357.80971
2013	4360.30594
2014	4559.89223
2015	4444.72529