Year	Measure
1971	1934.56125
1972	1912.97138
1973	1980.84696
1974	1998.43101
1975	2059.00485
1976	2075.32325
1977	2065.16174
1978	2127.95211
1979	2143.07778
1980	2196.9538
1981	2355.56199
1982	2496.50336
1983	2477.99047
1984	2622.88168
1985	2561.50892
1986	2608.80548
1987	2646.54417
1988	2696.95579
1989	2528.56168
1990	2421.5866
1991	2471.0215
1992	2250.64908
1993	2355.77096
1994	2381.63553
1995	2460.15855
1996	2466.51003
1997	2489.16914
1998	2433.053
1999	2424.93337
2000	2384.54809
2001	2417.85259
2002	2339.76307
2003	2469.20555
2004	2662.48346
2005	2626.98137
2006	2579.24562
2007	2732.91794
2008	2913.13007
2009	2824.46436
2010	2748.3635
2011	2703.17889
2012	2628.44834
2013	2598.95973
2014	2695.73376