Year	Measure
1960	1318.81249
1961	1396.46615
1962	1412.72968
1963	1453.96211
1964	1522.19497
1965	1511.90491
1966	1629.59187
1967	1767.42511
1968	1881.14935
1969	1974.58885
1970	2023.63108
1971	2245.32344
1972	2194.51306
1973	2238.47178
1974	2268.08988
1975	2083.99492
1976	2110.19194
1977	2203.82152
1978	2178.72098
1979	2534.33864
1980	2413.15635
1981	2392.95395
1982	2356.89426
1983	2336.18356
1984	2346.17853
1985	2438.4384
1986	2503.49889
1987	2608.80658
1988	2592.83865
1989	2655.24497
1990	2820.41017
1991	2827.8445
1992	2775.218
1993	2813.71046
1994	2941.61324
1995	2951.91309
1996	3122.33561
1997	3255.49845
1998	3417.56853
1999	3544.38762
2000	3626.74716
2001	3713.51387
2002	3661.32224
2003	3515.0945
2004	3558.08594
2005	3503.64286
2006	3424.16085
2007	3416.03095
2008	3293.88464
2009	3149.56514
2010	3152.00361
2011	2865.37474
2012	2853.06487
2013	2814.98269
2014	2741.57488
2015	2819.87585