Year	Measure
1960	1398.65484
1961	1454.75512
1962	1568.91106
1963	1869.5875
1964	1819.43534
1965	1943.60052
1966	1966.69214
1967	2040.8279
1968	2172.60388
1969	2334.44403
1970	2556.65871
1971	2637.67078
1972	2727.71922
1973	2998.00518
1974	2783.51454
1975	2710.77292
1976	2821.01289
1977	2877.79291
1978	2995.01682
1979	3042.17916
1980	3170.57547
1981	3093.32328
1982	2984.22326
1983	3173.30758
1984	3239.36997
1985	3412.39111
1986	3544.52206
1987	3430.85551
1988	3436.87583
1989	3339.08347
1990	3627.69281
1991	3637.19412
1992	3613.28433
1993	3490.88655
1994	3494.44715
1995	3421.65104
1996	3473.2063
1997	3525.8913
1998	3557.99008
1999	3547.37289
2000	3480.59157
2001	3673.29257
2002	3553.74026
2003	3542.0656
2004	3530.57834
2005	3488.21835
2006	3619.15164
2007	3410.81988
2008	3499.79098
2009	3481.85285
2010	3347.61836
2011	3205.32827
2012	3202.83434
2013	3304.11544
2014	3059.93675
2015	2960.07339