Year	Measure
1971	785.16153
1972	865.59248
1973	762.72536
1974	776.93475
1975	826.95208
1976	890.95336
1977	923.72887
1978	1010.81922
1979	864.19946
1980	1149.5361
1981	989.20015
1982	966.68328
1983	1000.12201
1984	1018.26314
1985	916.55519
1986	963.92717
1987	921.89304
1988	927.74452
1989	896.43776
1990	813.2557
1991	572.78184
1992	418.28663
1993	412.37888
1994	441.2493
1995	417.03484
1996	447.84887
1997	384.59496
1998	426.68282
1999	576.18363
2000	580.49476
2001	597.26525
2002	660.04798
2003	648.16839
2004	715.41448
2005	719.58438
2006	706.85941
2007	679.86177
2008	710.7485
2009	732.31668
2010	729.15437
2011	764.96862
2012	687.89626
2013	801.32998
2014	808.45584