Year	Measure
1971	1778.97266
1972	1707.323
1973	2308.84328
1974	2471.2987
1975	1998.79178
1976	1876.55513
1977	2000.93551
1978	2218.73327
1979	1917.65807
1980	1884.54919
1981	2062.49172
1982	2069.82024
1983	2074.43333
1984	1879.44184
1985	1638.26717
1986	1593.02929
1987	1470.42012
1988	1512.4221
1989	1370.22756
1990	1240.69535
1991	1247.10828
1992	1297.99557
1993	1337.62933
1994	1155.2836
1995	1234.83225
1996	1253.66115
1997	1237.65587
1998	1284.04216
1999	1219.1022
2000	1194.54368
2001	1250.66805
2002	1472.24718
2003	1686.85295
2004	1905.92763
2005	2140.7101
2006	2338.37632
2007	2526.9552
2008	2691.66649
2009	2851.20063
2010	3098.42154
2011	2411.3721
2012	2064.22069
2013	2913.54289
2014	2705.82333