Year	Measure
1971	2161.92157
1972	2303.49033
1973	2411.22595
1974	2529.89819
1975	2642.48931
1976	2770.92748
1977	2839.11863
1978	2980.30083
1979	3192.95046
1980	3376.92908
1981	3534.31247
1982	3609.00304
1983	3654.42026
1984	3900.00068
1985	3989.45774
1986	4084.43864
1987	4064.60369
1988	4152.28719
1989	4177.06346
1990	4152.97709
1991	4051.05852
1992	3927.21332
1993	3956.75839
1994	4003.8428
1995	4093.12214
1996	4633.81954
1997	4744.59734
1998	4535.28108
1999	4399.49821
2000	4503.77408
2001	4226.646
2002	4444.52497
2003	4470.82248
2004	4498.97865
2005	4547.65127
2006	4638.22422
2007	4777.05886
2008	4606.62949
2009	4385.25432
2010	4510.21653
2011	4543.62848
2012	4352.39203
2013	4279.24759
2014	4198.40119