Year	Measure
1971	313.12048
1972	346.88993
1973	392.29481
1974	399.50955
1975	377.36206
1976	390.78275
1977	401.47637
1978	331.1604
1979	399.6862
1980	425.93854
1981	418.43545
1982	376.65042
1983	165.61406
1984	93.49242
1985	163.80644
1986	259.30428
1987	288.61975
1988	305.03354
1989	308.84073
1990	326.76477
1991	339.77162
1992	355.21546
1993	340.51666
1994	340.90268
1995	354.82305
1996	367.6332
1997	393.38259
1998	275.16434
1999	361.0315
2000	332.01748
2001	337.76817
2002	310.92339
2003	221.1595
2004	219.85524
2005	245.84522
2006	296.74282
2007	244.09464
2008	264.26435
2009	263.01223
2010	280.51448
2011	318.48838
2012	345.7033
2013	379.67451
2014	354.71405