Year	Measure
1971	1059.38591
1972	1159.68999
1973	1230.65333
1974	1177.61561
1975	969.00823
1976	935.07896
1977	899.76767
1978	859.80425
1979	897.98326
1980	713.85257
1981	744.37049
1982	796.46299
1983	830.94754
1984	744.2929
1985	702.85805
1986	698.77465
1987	730.83536
1988	666.24378
1989	614.21473
1990	603.34786
1991	640.53431
1992	715.1926
1993	710.71217
1994	733.20634
1995	728.8627
1996	763.30881
1997	777.41481
1998	883.48359
1999	853.57686
2000	847.75671
2001	942.63912
2002	840.29607
2003	825.54857
2004	799.27611
2005	875.05589
2006	918.0319
2007	882.48243
2008	869.00487
2009	942.16241
2010	990.52789
2011	1056.0985
2012	1071.56386
2013	1034.76288
2014	1079.13015