Year	Measure
1960	1906.17493
1961	1937.64474
1962	2052.05448
1963	2182.99311
1964	2320.01313
1965	2539.59773
1966	2710.0782
1967	2815.68799
1968	3052.89657
1969	3193.65508
1970	3417.67466
1971	3414.31664
1972	3503.42995
1973	3608.10122
1974	3580.59955
1975	3651.68081
1976	3962.23292
1977	4060.10628
1978	4360.47071
1979	4467.19363
1980	4491.90698
1981	4414.96406
1982	4262.39171
1983	4427.79292
1984	4672.13755
1985	4815.3139
1986	5024.07619
1987	5048.49931
1988	4817.15567
1989	4984.19812
1990	4966.89358
1991	5105.1082
1992	5159.64862
1993	5459.62341
1994	5315.24487
1995	5391.41408
1996	5202.04728
1997	5475.18874
1998	5684.78859
1999	5913.30221
2000	5826.07777
2001	5954.04177
2002	5501.11774
2003	5933.21584
2004	5769.32671
2005	5802.71629
2006	5833.77393
2007	5862.21726
2008	6752.70898
2009	6484.11859
2010	6934.5902
2011	5649.69772
2012	5906.14105
2013	6415.99071
2014	5595.65462
2015	5815.80733