Year	Measure
1971	391.52359
1972	404.47441
1973	424.8396
1974	447.15034
1975	521.12856
1976	624.53937
1977	625.54464
1978	690.787
1979	798.81517
1980	712.14418
1981	684.66419
1982	690.29282
1983	810.50128
1984	835.65948
1985	945.02707
1986	998.77212
1987	969.96314
1988	1144.17042
1989	1231.89425
1990	1147.36764
1991	889.26503
1992	1284.36054
1993	1623.02555
1994	1783.99845
1995	1661.88276
1996	1613.00099
1997	1860.04355
1998	1286.27933
1999	964.13465
2000	1101.75243
2001	1196.87321
2002	1106.75424
2003	989.64851
2004	991.81331
2005	978.59479
2006	900.38144
2007	893.82987
2008	944.21227
2009	1101.9858
2010	1219.37245
2011	1293.56367
2012	1399.27499
2013	1456.6628
2014	1413.49626