Year	Measure
1971	231.57993
1972	261.46528
1973	305.12734
1974	319.22244
1975	330.39705
1976	366.5219
1977	398.65611
1978	476.77836
1979	586.3413
1980	579.45155
1981	610.8346
1982	771.2355
1983	807.84306
1984	776.33759
1985	786.32601
1986	862.41416
1987	827.55223
1988	849.70713
1989	820.31048
1990	856.15888
1991	883.72536
1992	883.74026
1993	867.5753
1994	819.26503
1995	838.76879
1996	798.14484
1997	804.86635
1998	820.64758
1999	863.78721
2000	865.66596
2001	856.21274
2002	904.32469
2003	948.95949
2004	948.23819
2005	973.87895
2006	1027.73647
2007	1073.99966
2008	1069.20022
2009	1149.37419
2010	1109.89246
2011	1135.74446
2012	1223.59179
2013	1241.03836
2014	1321.09949