Year	Measure
1971	14.68678
1972	29.62455
1973	50.80602
1974	95.01774
1975	153.05359
1976	252.3077
1977	364.07966
1978	398.91557
1979	483.58158
1980	623.71197
1981	754.55498
1982	899.14744
1983	1044.74553
1984	1240.32459
1985	1467.54875
1986	1793.50942
1987	1843.98196
1988	1979.60093
1989	1986.0323
1990	2186.89299
1991	2154.43155
1992	2245.27386
1993	2445.33232
1994	2498.10559
1995	2581.33824
1996	2620.86516
1997	2784.72539
1998	3064.11324
1999	3082.59546
2000	3201.95274
2001	3436.04875
2002	3522.7061
2003	3550.98302
2004	3830.65596
2005	3923.91257
2006	4209.0739
2007	4378.16072
2008	4776.70646
2009	5239.43943
2010	5521.03266
2011	5879.03133
2012	6236.42718
2013	6296.40836
2014	6553.5197