Year	Measure
1971	394.40075
1972	412.93373
1973	416.74603
1974	433.3627
1975	441.82688
1976	449.68315
1977	477.66924
1978	470.79989
1979	480.77511
1980	502.84807
1981	529.3789
1982	553.77754
1983	518.26219
1984	554.40998
1985	547.09768
1986	569.60672
1987	594.08235
1988	556.5786
1989	553.70294
1990	546.35025
1991	578.95821
1992	475.91913
1993	522.38099
1994	533.46078
1995	546.36762
1996	588.72208
1997	606.74885
1998	642.14928
1999	655.13102
2000	680.1884
2001	706.05627
2002	740.8238
2003	764.98628
2004	802.83959
2005	837.29289
2006	887.62253
2007	968.12877
2008	1039.45328
2009	1040.63558
2010	1094.31427
2011	1241.66713
2012	1211.31474
2013	1267.59668
2014	1307.51097