Year	Measure
1971	1022.75798
1972	841.19021
1973	969.46513
1974	963.43494
1975	1056.56231
1976	917.42317
1977	880.54311
1978	842.35748
1979	1136.72665
1980	1072.57532
1981	883.4641
1982	1042.92156
1983	1097.55455
1984	1066.15004
1985	1202.00616
1986	1450.10665
1987	1666.7227
1988	1954.59636
1989	1894.64151
1990	1972.87752
1991	2590.71614
1992	3123.62572
1993	3130.16913
1994	3576.08296
1995	3478.68776
1996	3516.72043
1997	3624.46885
1998	3795.36379
1999	3933.33548
2000	4100.35279
2001	4171.83018
2002	4211.86279
2003	4280.86381
2004	4579.38299
2005	4705.12701
2006	4860.6329
2007	4824.82313
2008	4879.65905
2009	5218.13934
2010	5212.1486
2011	5027.03188
2012	5111.76873
2013	5434.06934
2014	5759.00464