Year	Measure
1971	1182.37949
1972	1118.91206
1973	1175.46446
1974	1226.389
1975	1242.58559
1976	1290.26512
1977	1389.87221
1978	1460.99066
1979	1487.92027
1980	1488.69502
1981	1489.85205
1982	1503.68536
1983	1578.04558
1984	1536.1951
1985	1516.8153
1986	1498.92817
1987	1547.19269
1988	1607.89776
1989	1746.40312
1990	1645.06414
1991	1350.82761
1992	1175.85234
1993	976.6098
1994	1001.23569
1995	995.89897
1996	1082.02254
1997	1106.34863
1998	1032.40798
1999	1069.67144
2000	1142.28935
2001	1112.48525
2002	1033.7242
2003	1026.13588
2004	1000.96175
2005	945.5318
2006	943.04659
2007	897.14409
2008	952.04193
2009	1008.40121
2010	1089.10072
2011	1022.08804
2012	1053.63971
2013	1010.56627
2014	1022.66891