Year	Measure
1971	945.82023
1972	1188.65545
1973	1231.2021
1974	924.7469
1975	869.18146
1976	998.44419
1977	1074.36652
1978	1123.51708
1979	1208.1981
1980	1261.51361
1981	1232.10137
1982	1247.82493
1983	1290.51388
1984	1327.2172
1985	1306.77418
1986	1460.41152
1987	1635.55393
1988	1642.21112
1989	1675.88184
1990	1780.7032
1991	1778.89722
1992	1958.80011
1993	2056.48115
1994	2298.3228
1995	1981.39432
1996	2157.54909
1997	2071.92838
1998	2174.77638
1999	2145.32045
2000	2265.41685
2001	2201.68138
2002	2193.67716
2003	2346.79935
2004	2161.6334
2005	2159.60271
2006	2207.92456
2007	2292.22666
2008	2388.58948
2009	2299.81076
2010	2195.3475
2011	2105.25277
2012	1961.78447
2013	1687.78543
2014	1712.12409