Year	Measure
1971	313.13453
1972	347.30774
1973	374.97742
1974	400.2954
1975	429.93269
1976	466.68136
1977	530.86084
1978	560.53961
1979	618.26714
1980	658.78516
1981	688.84323
1982	728.64815
1983	768.22284
1984	816.23921
1985	842.74946
1986	883.9488
1987	923.98791
1988	996.85287
1989	1075.73171
1990	1156.81498
1991	1265.60664
1992	1418.41853
1993	1532.90847
1994	1784.26923
1995	2003.79623
1996	2187.28525
1997	2471.60662
1998	2525.47498
1999	2648.71303
2000	2748.08407
2001	2759.53655
2002	2821.66756
2003	2915.86804
2004	2986.32218
2005	2877.23096
2006	3072.41942
2007	3284.51548
2008	3301.23464
2009	3960.60435
2010	4159.63994
2011	4104.88823
2012	4323.34688
2013	4484.16998
2014	4596.33194