Year	Measure
1971	1632.08419
1972	1786.72073
1973	1906.92111
1974	2018.98016
1975	2214.61085
1976	2418.74932
1977	2550.13583
1978	2664.74254
1979	2694.10074
1980	2872.09444
1981	2946.26376
1982	2922.09031
1983	2971.16402
1984	3077.86832
1985	3129.89073
1986	3315.72283
1987	3275.68049
1988	3392.62498
1989	3412.00455
1990	2924.59627
1991	2521.00384
1992	2319.57275
1993	2272.12423
1994	2234.73508
1995	2328.79436
1996	2430.30153
1997	2250.9998
1998	2107.44546
1999	1935.56081
2000	1987.66019
2001	2066.78393
2002	2079.79606
2003	2237.93782
2004	2295.57051
2005	2365.41956
2006	2446.28608
2007	2529.90689
2008	2605.81974
2009	2390.57474
2010	2550.86329
2011	2639.03343
2012	2604.24314
2013	2494.53392
2014	2584.41179