Year	Measure
1960	695.04348
1961	752.01813
1962	838.13755
1963	886.19354
1964	1041.6703
1965	1134.39683
1966	1238.23041
1967	1343.34786
1968	1498.51657
1969	1608.78386
1970	1750.95105
1971	1884.66102
1972	2021.17326
1973	2143.2622
1974	2246.05578
1975	2175.22848
1976	2377.66557
1977	2535.79916
1978	2693.52077
1979	2935.01297
1980	2868.31927
1981	2827.39647
1982	2794.19359
1983	2852.7887
1984	2962.27264
1985	3114.96455
1986	3271.47293
1987	3414.63428
1988	3427.28363
1989	3598.11097
1990	3767.5293
1991	3897.87323
1992	4104.90019
1993	4185.09723
1994	4351.0642
1995	4525.27557
1996	4787.89062
1997	4976.63282
1998	5201.6109
1999	5433.86494
2000	5796.05558
2001	5896.93922
2002	6035.68665
2003	6092.54899
2004	6168.39899
2005	6241.71557
2006	6351.09911
2007	6218.3134
2008	6340.73305
2009	5947.90949
2010	5927.86868
2011	5657.53816
2012	5651.00848
2013	5698.75618
2014	5672.06413