Year	Measure
1960	1576.33881
1961	1627.51357
1962	1753.14389
1963	1880.99382
1964	2062.99498
1965	2163.96033
1966	2255.18842
1967	2357.58493
1968	2596.17772
1969	2830.59397
1970	3031.52105
1971	3217.04526
1972	3612.35553
1973	3941.60374
1974	4134.39088
1975	3887.47743
1976	4247.40638
1977	4404.82432
1978	4623.38968
1979	4906.08508
1980	4893.88535
1981	4910.95328
1982	4904.07001
1983	5043.97536
1984	5285.54376
1985	5502.66841
1986	5617.41982
1987	5876.963
1988	6057.06273
1989	6205.76377
1990	6380.31322
1991	6655.41438
1992	6850.66377
1993	6881.07214
1994	7176.24051
1995	7379.73708
1996	7527.68854
1997	7701.61213
1998	7913.05858
1999	7944.12981
2000	8247.67711
2001	8267.18722
2002	8311.89268
2003	8411.90066
2004	8576.2235
2005	8509.99707
2006	8683.67129
2007	8614.6795
2008	8521.49674
2009	7903.95548
2010	8393.94962
2011	8021.90927
2012	7973.22417
2013	7972.94635
2014	7709.12308