Year	Measure
1971	434.19563
1972	435.42479
1973	439.02134
1974	449.42155
1975	448.75561
1976	460.02072
1977	474.53437
1978	476.3176
1979	467.93727
1980	446.29668
1981	435.02145
1982	414.60181
1983	426.41393
1984	431.88889
1985	433.20026
1986	490.73768
1987	512.0116
1988	513.96756
1989	561.16184
1990	629.38207
1991	634.42172
1992	657.78682
1993	678.84149
1994	657.62379
1995	697.00398
1996	702.2344
1997	712.57198
1998	750.44316
1999	775.37445
2000	851.22166
2001	886.76379
2002	873.1958
2003	909.06319
2004	919.7979
2005	945.72377
2006	1006.50164
2007	1007.57484
2008	1027.17421
2009	999.48694
2010	1053.4525
2011	1053.50989
2012	1067.78025
2013	1094.72587
2014	1111.42217