Year	Measure
1971	1206.04806
1972	977.61755
1973	1077.26551
1974	1146.43676
1975	1180.41063
1976	1300.45291
1977	1379.55725
1978	1967.69169
1979	2445.59824
1980	3192.86853
1981	4081.19297
1982	4291.35651
1983	4406.54074
1984	3660.76162
1985	3487.24088
1986	3312.82322
1987	3781.04664
1988	4148.76812
1989	3990.98601
1990	3552.71429
1991	4002.95201
1992	4426.46391
1993	4471.44607
1994	4588.95434
1995	4510.41664
1996	4728.22817
1997	4422.53651
1998	4623.70447
1999	4611.61977
2000	4712.74367
2001	4715.13208
2002	5078.4989
2003	4990.77012
2004	5157.48036
2005	5126.34137
2006	5525.01843
2007	5556.71338
2008	6034.52326
2009	6250.32811
2010	6763.33688
2011	6307.89205
2012	6888.06639
2013	6417.91715
2014	6937.23068