Year	Measure
1971	33.17169
1972	33.5555
1973	31.57837
1974	36.02756
1975	37.6243
1976	42.78687
1977	43.59263
1978	47.76586
1979	50.37363
1980	61.94202
1981	64.38213
1982	74.73227
1983	76.06109
1984	81.92421
1985	83.57113
1986	94.98929
1987	97.94342
1988	107.22522
1989	105.17851
1990	122.00342
1991	129.52535
1992	130.50086
1993	132.83643
1994	119.17494
1995	124.60304
1996	120.14262
1997	133.40278
1998	130.32508
1999	128.84034
2000	139.02312
2001	143.6096
2002	151.38078
2003	161.59624
2004	169.25556
2005	179.42055
2006	189.55098
2007	206.65142
2008	225.34943
2009	222.45988
2010	249.97057
2011	190.25073
2012	190.4057
2013	246.75166
2014	216.25883