Year	Measure
1971	361.92204
1972	291.09852
1973	292.48388
1974	363.4116
1975	405.12644
1976	443.55919
1977	476.80131
1978	504.00064
1979	631.70378
1980	499.97772
1981	576.2144
1982	666.84146
1983	737.83388
1984	820.05021
1985	735.49776
1986	730.99793
1987	787.40001
1988	790.60687
1989	769.83834
1990	840.84551
1991	889.73571
1992	827.21875
1993	808.27315
1994	820.03903
1995	843.33308
1996	865.67532
1997	913.80413
1998	990.54903
1999	960.70646
2000	940.88587
2001	944.75693
2002	963.24177
2003	949.88294
2004	970.91798
2005	1136.49943
2006	1143.50908
2007	1153.21198
2008	1136.53336
2009	1032.00967
2010	1030.49617
2011	953.40964
2012	726.9748
2013	587.43643
2014	562.5354