Year	Measure
1960	4002.32155
1961	4355.45329
1962	4613.97791
1963	4728.75447
1964	5189.29161
1965	5521.18071
1966	5632.19049
1967	6017.97347
1968	6512.91987
1969	7017.88337
1970	7315.98357
1971	7674.29449
1972	8131.93307
1973	8745.48567
1974	8786.44551
1975	9051.5191
1976	9751.54598
1977	9828.34719
1978	10143.43493
1979	10694.29028
1980	10703.40752
1981	11112.30896
1982	11440.23919
1983	12609.02676
1984	13692.98413
1985	14950.32685
1986	14858.36807
1987	15746.25938
1988	15895.8306
1989	15680.86242
1990	15836.03376
1991	15932.92621
1992	15544.41146
1993	15506.8021
1994	15290.616
1995	15475.01348
1996	15434.23039
1997	15410.69913
1998	15522.1335
1999	15470.86807
2000	15681.61527
2001	16020.98031
2002	15709.42967
2003	15360.17889
2004	15420.97314
2005	15430.96395
2006	15262.58727
2007	15257.93575
2008	14869.34898
2009	14143.01101
2010	14934.32696
2011	14030.16315
2012	14289.59509
2013	13870.38991
2014	13480.14822