Year	Percent
1998	101.81629
1999	116.87538
2000	113.68003
2001	108.70466
2002	101.9316
2003	97.03337
2004	90.8984
2005	84.0072
2006	81.4235
2007	83.59879
2008	86.72284
2009	86.46192
2010	89.13558
2011	86.12142
2012	83.17084
2013	80.112
2014	71.75129
2015	73.4531
2016	73.34408