Year	Measure
1965	1426.89966
1966	1447.93795
1967	1476.04958
1968	1506.99949
1969	1607.81594
1970	1730.16287
1971	1836.34975
1972	1880.5388
1973	2039.36703
1974	2101.98707
1975	2173.24697
1976	2311.17337
1977	2428.82933
1978	2674.05933
1979	2638.20497
1980	2646.30419
1981	2630.04292
1982	2630.75848
1983	2594.39478
1984	2697.39415
1985	2794.25194
1986	2787.68417
1987	2894.82745
1988	2863.97624
1989	2874.89581
1990	2774.49203
1991	2642.92257
1992	2423.17945
1993	2481.44841
1994	2406.68835
1995	2503.0778
1996	2572.97436
1997	2527.30163
1998	2502.20405
1999	2490.7126
2000	2448.14034
2001	2512.67485
2002	2520.15247
2003	2580.2075
2004	2579.29172
2005	2731.0397
2006	2713.25708
2007	2658.03637
2008	2636.64677
2009	2478.1017
2010	2568.94899
2011	2500.32136
2012	2365.5537
2013	2271.94721
2014	2314.49643
2015	2432.75179