Year	Measure
1971	2228.68705
1972	2262.78655
1973	2378.25374
1974	2463.24405
1975	2665.45943
1976	2780.33176
1977	2954.26674
1978	3084.45204
1979	3200.49898
1980	3203.6101
1981	3185.50954
1982	3309.20643
1983	3370.13232
1984	3387.27422
1985	3419.76768
1986	3450.94172
1987	3411.07339
1988	3488.29275
1989	3426.94221
1990	3237.35265
1991	2536.64401
1992	2396.00727
1993	2590.01125
1994	2519.85915
1995	2746.66773
1996	2745.71
1997	2504.12268
1998	2425.94625
1999	2230.6603
2000	2277.36797
2001	2421.14536
2002	2410.96935
2003	2490.41667
2004	2440.69816
2005	2597.89617
2006	2691.46044
2007	2666.11145
2008	2648.86706
2009	2351.65505
2010	2416.70391
2011	2617.12787
2012	2513.35238
2013	2329.1228
2014	2477.6554