Year	Measure
1960	4049.78663
1961	4182.1755
1962	4433.60602
1963	4690.48626
1964	4970.44646
1965	5234.685
1966	5590.33374
1967	5888.34092
1968	6385.45933
1969	6904.8338
1970	7236.65704
1971	7517.30465
1972	8076.40927
1973	8573.19415
1974	8449.92846
1975	8522.394
1976	8968.77566
1977	9337.72402
1978	9560.54541
1979	9700.69539
1980	9862.3655
1981	9976.69371
1982	9544.46094
1983	9742.00571
1984	10282.37464
1985	10414.2079
1986	10424.4273
1987	10886.85826
1988	11298.33251
1989	11531.93231
1990	11713.3317
1991	12134.17213
1992	12014.95825
1993	12261.52378
1994	12455.16217
1995	12659.60763
1996	12854.29891
1997	12889.83228
1998	13154.76303
1999	13281.86998
2000	13671.05202
2001	13046.61415
2002	13296.1823
2003	13307.49201
2004	13388.58971
2005	13704.57705
2006	13583.26696
2007	13657.45283
2008	13663.42797
2009	12913.71469
2010	13394.4144
2011	13243.29778
2012	12959.41462
2013	12996.84549
2014	12984.33311