Year	Measure
1971	990.56307
1972	1133.75435
1973	1218.68461
1974	1043.06293
1975	1029.61886
1976	1139.10459
1977	1217.07877
1978	1284.81057
1979	1358.80155
1980	1415.21959
1981	1436.50433
1982	1536.78896
1983	1655.43592
1984	1684.06388
1985	1766.41035
1986	1872.69861
1987	1950.5654
1988	2091.03043
1989	2295.47137
1990	2430.16694
1991	2481.07272
1992	2837.83969
1993	3004.57648
1994	3058.14051
1995	2784.71423
1996	2816.50472
1997	2866.94674
1998	3097.81843
1999	3178.01415
2000	3373.31414
2001	3455.23502
2002	3703.30185
2003	3918.22159
2004	3946.91264
2005	4099.61291
2006	4238.12707
2007	4377.12464
2008	4554.51971
2009	4577.09667
2010	4585.62637
2011	4239.73294
2012	4035.02188
2013	3587.73875
2014	3624.89575