Year	Measure
1971	162.28283
1972	158.80577
1973	167.3641
1974	169.29281
1975	167.23197
1976	161.84849
1977	158.36652
1978	148.38915
1979	142.93573
1980	150.925
1981	135.65356
1982	130.35163
1983	138.03968
1984	141.339
1985	148.14222
1986	150.65589
1987	145.83019
1988	145.88143
1989	169.48828
1990	130.8697
1991	125.46351
1992	115.19261
1993	102.54008
1994	101.25715
1995	108.83325
1996	104.81513
1997	95.39097
1998	93.41995
1999	95.20974
2000	96.63019
2001	95.61036
2002	89.79497
2003	90.27042
2004	88.24492
2005	89.51357
2006	101.83398
2007	105.3108
2008	101.26942
2009	106.85884
2010	104.72192
2011	108.08891
2012	112.25207
2013	117.09849
2014	108.58233