Year	Measure
1971	714.03848
1972	746.88214
1973	799.1386
1974	830.31705
1975	846.44899
1976	867.52878
1977	875.46642
1978	909.71734
1979	944.67698
1980	939.67784
1981	880.59902
1982	874.75834
1983	876.31719
1984	912.20964
1985	953.39774
1986	977.65227
1987	995.69936
1988	990.0155
1989	991.4412
1990	938.76755
1991	940.00137
1992	933.90059
1993	941.62446
1994	975.31576
1995	992.59454
1996	1028.80175
1997	1064.04804
1998	1072.76407
1999	1080.6411
2000	1069.33747
2001	1072.91729
2002	1086.6367
2003	1090.38898
2004	1136.96824
2005	1152.01634
2006	1178.85091
2007	1232.60168
2008	1288.11729
2009	1233.75363
2010	1351.0289
2011	1359.12236
2012	1404.75527
2013	1451.1678
2014	1484.92664