Year	Measure
1971	473.0595
1972	474.61166
1973	482.53166
1974	482.84662
1975	517.92196
1976	540.04053
1977	558.58533
1978	558.19015
1979	577.77853
1980	520.68076
1981	494.01968
1982	473.46423
1983	446.28958
1984	460.09404
1985	457.51851
1986	428.92983
1987	442.70508
1988	449.89248
1989	456.35346
1990	476.1671
1991	478.28755
1992	492.76297
1993	479.76042
1994	493.96012
1995	511.15806
1996	513.63722
1997	525.55992
1998	558.91422
1999	600.2719
2000	604.31579
2001	602.79451
2002	593.54314
2003	602.6144
2004	606.24759
2005	595.59043
2006	591.31315
2007	621.27521
2008	582.39989
2009	654.03325
2010	696.79463
2011	729.14844
2012	725.05353
2013	772.30262
2014	830.09452