Year	Measure
1971	857.55694
1972	872.98574
1973	845.72838
1974	832.35395
1975	863.96268
1976	873.23421
1977	868.79271
1978	883.8665
1979	937.47909
1980	906.55324
1981	867.98015
1982	766.14284
1983	704.81691
1984	672.81752
1985	663.30578
1986	680.07758
1987	718.44768
1988	765.34937
1989	780.31935
1990	723.84597
1991	779.41604
1992	855.12425
1993	792.1618
1994	751.14778
1995	797.56692
1996	872.90377
1997	880.63473
1998	900.58831
1999	977.90542
2000	930.94276
2001	814.99581
2002	762.69746
2003	758.64504
2004	863.10113
2005	889.20686
2006	955.4581
2007	947.84116
2008	1239.44051
2009	1228.18641
2010	1211.18327
2011	1305.02265
2012	1365.20737
2013	1350.43464
2014	1378.27361