Year	Measure
1960	1952.58863
1961	1994.32463
1962	2124.84854
1963	2281.28993
1964	2341.14631
1965	2378.33973
1966	2387.68488
1967	2388.41235
1968	2561.52258
1969	2772.01093
1970	3860.86494
1971	3895.26473
1972	4017.33739
1973	4240.06186
1974	4158.27163
1975	3984.97424
1976	4314.58164
1977	4336.0874
1978	4483.88085
1979	4685.29673
1980	4562.29597
1981	4399.49982
1982	4257.86441
1983	4268.04891
1984	4447.31664
1985	4598.13849
1986	4589.15366
1987	4616.39706
1988	4629.17767
1989	4514.70471
1990	4421.36453
1991	4302.89118
1992	4190.98422
1993	4122.69574
1994	4088.79813
1995	4119.68895
1996	4246.55319
1997	4203.35737
1998	4177.29413
1999	4079.93334
2000	4094.06036
2001	4209.79609
2002	4108.4013
2003	4084.50335
2004	4114.38993
2005	4086.50341
2006	4204.65469
2007	3985.81195
2008	4036.83078
2009	3790.50115
2010	3997.07942
2011	3869.81623
2012	3876.9481
2013	3939.52956
2014	3779.46192
2015	3817.54941