Year	Measure
1971	1007.59828
1972	1071.25145
1973	1207.8094
1974	1006.63585
1975	1111.03076
1976	1249.28869
1977	1358.43894
1978	1479.77639
1979	1598.89195
1980	1664.3244
1981	1749.31501
1982	1831.8615
1983	1860.68183
1984	1920.79082
1985	2110.25644
1986	2250.6657
1987	2487.7716
1988	2692.00317
1989	2851.26111
1990	2823.50284
1991	3597.68583
1992	3726.69456
1993	3716.59108
1994	3735.35541
1995	3921.37121
1996	3790.42129
1997	3827.15372
1998	3921.75184
1999	4197.86469
2000	4311.85864
2001	4292.31505
2002	4500.3523
2003	4872.2722
2004	4797.29258
2005	4912.90976
2006	4897.51004
2007	4873.08347
2008	4836.59396
2009	4434.18663
2010	4767.09738
2011	4867.0568
2012	5002.04748
2013	4915.87376
2014	4924.54402