Year	Measure
1960	1873.29247
1961	2187.62364
1962	2389.20988
1963	2479.15851
1964	2715.37501
1965	2938.38464
1966	3197.86486
1967	3345.38785
1968	3628.68529
1969	4071.5561
1970	4570.9068
1971	4889.50427
1972	5516.14053
1973	6046.83031
1974	6140.18668
1975	5946.37733
1976	6545.7468
1977	6726.66369
1978	7330.41447
1979	7930.63137
1980	8295.7861
1981	8493.60537
1982	8533.16174
1983	9124.16463
1984	9808.46626
1985	10482.83161
1986	10622.88818
1987	11358.39475
1988	11778.27227
1989	12034.75727
1990	12485.68365
1991	12470.73043
1992	12514.10157
1993	13012.66943
1994	13603.27636
1995	13591.39667
1996	13721.92376
1997	14454.93873
1998	14846.42082
1999	15075.86719
2000	15305.40981
2001	15709.88325
2002	16140.06697
2003	16445.57256
2004	16777.56585
2005	16117.89033
2006	17215.03729
2007	17160.86312
2008	16349.23333
2009	15243.11039
2010	16484.09428
2011	15710.97376
2012	15689.22331
2013	15510.8355
2014	15249.98938