Year	Measure
1971	909.07734
1972	936.4949
1973	963.29519
1974	990.52926
1975	1018.75667
1976	1033.23844
1977	1049.6781
1978	1066.99683
1979	1083.9732
1980	1098.94953
1981	1112.33118
1982	1123.6876
1983	1134.42766
1984	1145.715
1985	1204.14862
1986	1188.61219
1987	1209.34628
1988	1282.09792
1989	1323.96341
1990	1237.41848
1991	1156.86479
1992	1024.48231
1993	902.48048
1994	925.85118
1995	905.94315
1996	825.60248
1997	736.98365
1998	637.51989
1999	692.76836
2000	712.37065
2001	735.22133
2002	713.46907
2003	751.06612
2004	779.62037
2005	807.01411
2006	785.04318
2007	748.6999
2008	802.83061
2009	727.09744
2010	741.67605
2011	654.7126
2012	651.56425
2013	617.66649
2014	600.28596