Year	Percent
1982	111.73629
1983	113.6065
1984	115.38906
1985	106.91445
1986	109.47368
1987	111.22902
1988	107.10293
1989	105.20481
1990	99.03232
1991	92.37382
1992	82.68504
1993	76.70117
1994	74.09279
1995	74.51519
1996	74.57747
1997	74.50793
1998	74.77508
1999	76.86035
2000	89.97553
2001	91.88201
2002	93.88876
2003	93.44479
2004	95.28615
2005	84.8594
2006	78.99407
2007	79.31023
2008	80.11206
2009	78.92014
2010	87.79032
2011	90.67359
2012	91.10576
2013	90.63795
2014	84.93632
2015	77.913
2016	76.07221
2017	79.3953