Year	Measure
1971	741.96327
1972	760.61281
1973	747.57922
1974	797.46905
1975	813.39923
1976	894.14608
1977	997.7756
1978	1078.83856
1979	918.8194
1980	914.21955
1981	995.0382
1982	1082.68535
1983	1153.82837
1984	1156.80376
1985	1206.01224
1986	1372.27582
1987	1470.08942
1988	1650.13842
1989	1661.16387
1990	1510.63389
1991	1554.12274
1992	1831.05474
1993	1784.39349
1994	1761.47811
1995	1719.89782
1996	1621.48722
1997	1546.68161
1998	2002.5238
1999	2431.88254
2000	2039.05416
2001	2109.68038
2002	1949.17276
2003	2009.21837
2004	1872.47026
2005	1844.4904
2006	1932.90968
2007	2058.59752
2008	2006.29854
2009	2107.36634
2010	1946.64617
2011	2087.21166
2012	1994.7156
2013	1943.84544
2014	1970.48413