Year	Percent
1990	1.23789
1991	1.93612
1992	2.65649
1993	2.70927
1994	2.36667
1995	1.90976
1996	1.76034
1997	1.85375
1998	1.77538
1999	1.46622
2000	1.24126
2001	1.23885
2002	1.16524
2003	1.05149
2004	0.91791
2005	0.79162
2006	0.76218
2007	0.61648
2008	0.5932
2009	0.87643
2010	0.91224
2011	0.86633
2012	0.90729
2013	1.01693
2014	1.21399
2015	1.24037
2016	1.18744
2017	1.16527