Year	Measure
1960	5641.74076
1961	5612.0795
1962	5774.58631
1963	5986.78395
1964	6136.93823
1965	6307.8902
1966	6591.34056
1967	6809.82048
1968	7073.47895
1969	7332.36855
1970	7569.0766
1971	7644.5248
1972	7940.99783
1973	8163.60379
1974	7909.58648
1975	7656.26358
1976	8100.56222
1977	8285.5709
1978	8438.40308
1979	8327.04171
1980	7942.25302
1981	7647.53805
1982	7259.0789
1983	7199.11853
1984	7443.32002
1985	7456.2629
1986	7376.09624
1987	7622.17302
1988	7849.75397
1989	7890.2872
1990	7671.77307
1991	7631.46781
1992	7677.4014
1993	7709.49659
1994	7757.83082
1995	7763.75511
1996	7844.46827
1997	7828.5811
1998	7803.6976
1999	7923.22389
2000	8056.86385
2001	7827.88633
2002	7843.34485
2003	7794.23553
2004	7881.57864
2005	7846.49969
2006	7697.65254
2007	7758.16599
2008	7488.08192
2009	7056.78365
2010	7161.16546
2011	7028.58312
2012	6869.49705
2013	6901.78682
2014	6955.52402
2015	6797.62061