Year	Measure
1971	235.75987
1972	260.45869
1973	321.8873
1974	309.39009
1975	314.46812
1976	329.21826
1977	328.1991
1978	328.53186
1979	345.38322
1980	373.5049
1981	337.32527
1982	338.1368
1983	362.4524
1984	341.32104
1985	350.12376
1986	311.37513
1987	319.36735
1988	343.12057
1989	360.57835
1990	360.74184
1991	353.85837
1992	334.98021
1993	335.19756
1994	377.175
1995	398.52101
1996	428.28086
1997	462.05583
1998	478.34024
1999	467.3822
2000	499.34885
2001	518.88328
2002	522.38382
2003	555.56925
2004	575.4708
2005	576.64955
2006	568.25339
2007	582.38288
2008	585.56373
2009	590.12667
2010	639.5408
2011	645.43797
2012	666.49363
2013	685.66503
2014	699.20507