Year	Measure
1971	93.55449
1972	91.03616
1973	101.31704
1974	107.3672
1975	111.24769
1976	107.94437
1977	110.22432
1978	121.77072
1979	139.82168
1980	136.02219
1981	147.70076
1982	159.26494
1983	171.0012
1984	183.61754
1985	198.82999
1986	214.11973
1987	228.28972
1988	255.42293
1989	264.38856
1990	277.35312
1991	297.31667
1992	333.88973
1993	334.89634
1994	345.36322
1995	357.92807
1996	359.46957
1997	362.99554
1998	344.25615
1999	356.167
2000	372.39949
2001	378.18825
2002	384.78677
2003	409.8213
2004	429.10778
2005	463.05733
2006	486.79137
2007	480.98652
2008	442.70938
2009	458.83982
2010	465.16132
2011	455.32241
2012	450.38115
2013	481.87634
2014	471.04157