Year	Measure
1960	1827.93682
1961	1894.05744
1962	1976.85979
1963	1984.01674
1964	2031.26137
1965	2088.01079
1966	2140.86869
1967	2199.05462
1968	2290.23626
1969	2438.36689
1970	2549.98038
1971	2627.02149
1972	2693.74528
1973	2784.33271
1974	2882.11696
1975	3029.42782
1976	3157.94611
1977	3251.80257
1978	3488.40641
1979	3565.32514
1980	3559.32651
1981	3245.29782
1982	3412.49866
1983	3350.91951
1984	3211.69685
1985	3351.95416
1986	3464.24289
1987	3535.48197
1988	3496.98511
1989	3259.2233
1990	2705.60874
1991	2641.02945
1992	2569.17533
1993	2624.64884
1994	2496.17271
1995	2577.52968
1996	2680.10207
1997	2643.12354
1998	2459.83454
1999	2396.69212
2000	2320.37672
2001	2336.44584
2002	2314.20258
2003	2375.00613
2004	2383.05568
2005	2414.16179
2006	2536.97805
2007	2527.40841
2008	2564.77564
2009	2466.52404
2010	2640.23891
2011	2653.40366
2012	2566.57431
2013	2565.67046
2014	2473.40688
2015	2490.20642