Year	Measure
1971	1558.76546
1972	1546.17922
1973	1605.30091
1974	1563.19027
1975	1656.63669
1976	1681.12434
1977	1638.68638
1978	1630.66991
1979	1723.16665
1980	1717.75899
1981	1780.18066
1982	1876.17261
1983	1941.87539
1984	1945.58945
1985	2019.39948
1986	2099.72004
1987	2084.45401
1988	2239.64166
1989	2631.39908
1990	2537.37485
1991	2978.22813
1992	3267.64015
1993	3375.75533
1994	3445.39221
1995	3482.93363
1996	3521.82213
1997	3530.10394
1998	3636.24558
1999	3743.02217
2000	3880.69275
2001	3888.57015
2002	3962.71874
2003	4098.36066
2004	4138.44996
2005	4394.57691
2006	4520.68368
2007	4613.96493
2008	4918.73396
2009	5128.04952
2010	5182.43997
2011	4969.31597
2012	5085.80436
2013	5409.24005
2014	5640.75445