Year	Measure
1971	3424.20204
1972	3595.79684
1973	3729.99474
1974	3860.35524
1975	4031.2687
1976	4173.44011
1977	4292.92743
1978	4499.95694
1979	4392.39236
1980	4585.12375
1981	4639.73378
1982	4675.59996
1983	4812.15546
1984	4959.82029
1985	5141.66521
1986	5259.31214
1987	5447.30528
1988	5504.92329
1989	5576.93473
1990	5600.40761
1991	5256.30208
1992	5077.66018
1993	5032.40365
1994	5186.96944
1995	5470.67066
1996	5729.38625
1997	5660.06003
1998	5604.80954
1999	5493.85153
2000	5703.81674
2001	5892.1726
2002	5894.23312
2003	6074.84914
2004	6230.39823
2005	6357.42109
2006	6528.53015
2007	6518.21741
2008	6489.12626
2009	6139.35206
2010	6348.4244
2011	6298.72768
2012	6304.57192
2013	6284.79081
2014	6258.89104