Year	Measure
1971	297.20058
1972	301.35799
1973	307.07739
1974	310.3151
1975	314.62314
1976	320.82188
1977	347.86821
1978	363.45959
1979	371.45055
1980	377.67944
1981	388.28743
1982	388.83447
1983	387.09654
1984	393.51473
1985	398.9133
1986	431.18869
1987	436.66903
1988	440.18404
1989	456.70996
1990	543.70487
1991	560.51531
1992	574.48475
1993	620.71033
1994	611.7073
1995	664.35734
1996	678.27168
1997	691.00222
1998	666.39995
1999	688.38201
2000	735.82086
2001	742.69678
2002	759.64255
2003	751.30894
2004	789.92699
2005	792.92688
2006	800.53944
2007	785.99278
2008	790.78442
2009	843.45253
2010	874.58064
2011	831.55603
2012	851.73143
2013	863.04351
2014	883.91098