Year	Measure
1971	1021.59737
1972	1070.49494
1973	1117.63895
1974	1182.75098
1975	1150.0895
1976	1166.17338
1977	1104.62723
1978	1061.17575
1979	1039.57501
1980	1030.69501
1981	1066.42276
1982	1049.84229
1983	1028.59109
1984	988.31166
1985	943.89646
1986	897.40743
1987	882.38249
1988	933.54379
1989	780.54132
1990	762.77651
1991	737.40262
1992	735.65993
1993	739.51733
1994	729.30761
1995	707.33781
1996	681.58322
1997	633.72995
1998	577.67544
1999	579.99667
2000	591.00459
2001	611.13485
2002	635.49821
2003	653.82687
2004	674.5799
2005	681.45484
2006	692.61819
2007	652.52373
2008	579.01702
2009	558.24667
2010	580.14302
2011	621.04112
2012	721.49969
2013	735.88368
2014	707.19022