Year	Percent
1993	2.3304
1994	2.2834
1995	1.84362
1996	1.7319
1997	1.66205
1998	1.82593
1999	1.85907
2000	1.87736
2001	1.75125
2002	1.82441
2003	1.89276
2004	1.7137
2005	1.79008
2006	1.57591
2007	1.43091
2008	1.23821
2009	1.31854
2010	1.20394
2011	1.08547
2012	1.07081
2013	1.02615
2014	0.97339
2015	0.95268
2016	1.00106
2017	1.05177