Year	Measure
1971	295.59613
1972	343.58635
1973	397.08943
1974	458.94955
1975	501.71871
1976	577.93176
1977	659.23693
1978	779.51407
1979	880.55609
1980	913.62936
1981	971.79348
1982	1027.8604
1983	1140.70509
1984	1250.23648
1985	1340.12996
1986	1480.0185
1987	1674.24725
1988	1920.52356
1989	2095.19471
1990	2373.21441
1991	2588.84808
1992	2826.18879
1993	3091.3712
1994	3495.48873
1995	3881.02444
1996	4280.71094
1997	4651.62888
1998	4436.17441
1999	4878.83338
2000	5906.95933
2001	6309.2034
2002	6673.9377
2003	6977.31766
2004	7390.79415
2005	7796.31467
2006	8039.79628
2007	8462.20654
2008	8772.28746
2009	8877.57493
2010	9716.12608
2011	10129.95709
2012	10305.32898
2013	10384.62216
2014	10496.51367