Year	Measure
1971	612.58374
1972	598.97529
1973	589.07156
1974	610.11274
1975	623.48204
1976	633.80957
1977	638.02536
1978	621.08497
1979	592.80041
1980	638.33318
1981	632.04076
1982	635.43281
1983	641.6209
1984	648.68469
1985	644.58516
1986	687.1891
1987	696.06641
1988	702.9328
1989	694.9587
1990	706.78433
1991	701.289
1992	704.35482
1993	723.83844
1994	736.60572
1995	737.1056
1996	743.03374
1997	709.82167
1998	732.19548
1999	645.17449
2000	638.88582
2001	627.17942
2002	606.26675
2003	610.4943
2004	608.5252
2005	625.69745
2006	649.37619
2007	637.51184
2008	659.61195
2009	676.04427
2010	679.53043
2011	673.43141
2012	672.86825
2013	710.85777
2014	711.58318