Year	Measure
1990	1004.54641
1991	938.90049
1992	752.89789
1993	579.91614
1994	438.05979
1995	385.98268
1996	367.25025
1997	360.7867
1998	373.78969
1999	366.05261
2000	345.65495
2001	335.19205
2002	329.94369
2003	329.6446
2004	349.27492
2005	341.41186
2006	344.66615
2007	360.5533
2008	335.6932
2009	285.34158
2010	284.75168
2011	279.19719
2012	293.52743
2013	318.07847
2014	335.38545