Year	Measure
1971	259.36283
1972	259.90946
1973	305.2643
1974	323.71829
1975	365.26745
1976	412.40725
1977	485.19715
1978	578.81216
1979	726.59119
1980	792.0397
1981	734.27335
1982	899.0665
1983	1037.11175
1984	1215.74422
1985	1279.11497
1986	1328.59574
1987	1309.50306
1988	1336.19132
1989	1329.79738
1990	1305.16878
1991	1092.92267
1992	1306.52052
1993	1321.90773
1994	1369.98891
1995	1415.60036
1996	1372.30868
1997	1355.69322
1998	1314.09065
1999	1274.57825
2000	1237.4067
2001	1238.47248
2002	1264.55038
2003	1040.7909
2004	1202.13056
2005	833.85089
2006	972.99753
2007	768.85055
2008	750.18677
2009	836.50413
2010	1195.99381
2011	1272.73088
2012	1110.27478
2013	1397.12533
2014	1305.68747