Year	Measure
1971	2696.68404
1972	2829.46912
1973	3026.21274
1974	3138.20535
1975	3111.76899
1976	3260.46084
1977	3413.48964
1978	3468.62299
1979	3806.45936
1980	4358.59565
1981	4411.78963
1982	4439.28002
1983	4520.84271
1984	4624.05919
1985	4841.36443
1986	4941.62506
1987	5085.16439
1988	5150.46292
1989	5266.16858
1990	5542.1709
1991	5115.12279
1992	4699.13757
1993	4570.44244
1994	4582.58196
1995	4925.96138
1996	5150.40772
1997	5068.08939
1998	4682.29758
1999	5028.70634
2000	4955.9079
2001	5027.45281
2002	5051.59839
2003	5021.79822
2004	5097.83556
2005	4932.80328
2006	5153.12148
2007	5272.37078
2008	5294.4351
2009	4954.13825
2010	5201.4049
2011	5347.52622
2012	5137.78902
2013	5202.46729
2014	5137.07384