Year	Measure
1971	695.95639
1972	873.03356
1973	844.47717
1974	775.46391
1975	687.98772
1976	778.16623
1977	822.86543
1978	950.34206
1979	907.52596
1980	1005.12246
1981	1129.51201
1982	1255.8101
1983	945.09022
1984	1245.23508
1985	1023.8994
1986	1678.11388
1987	1750.65387
1988	1871.37695
1989	1983.2688
1990	1961.64271
1991	1846.50057
1992	1807.05787
1993	2289.02151
1994	2056.3425
1995	1879.09459
1996	1836.66969
1997	2047.42275
1998	1792.82717
1999	1943.42558
2000	1731.70857
2001	2001.33578
2002	1851.91265
2003	2071.49846
2004	2066.58393
2005	2181.14374
2006	2055.68605
2007	2156.5558
2008	2043.5269
2009	1887.20341
2010	2012.31581
2011	1993.32882
2012	2090.39397
2013	1803.21011
2014	1781.50443