Year	Percent
1992	1.99244
1993	2.88709
1994	2.717
1995	2.85608
1996	2.89425
1997	2.39931
1998	2.44028
1999	1.94731
2000	1.83923
2001	1.55195
2002	1.54517
2003	1.57099
2004	1.60686
2005	2.01095
2006	2.13644
2007	2.12522
2008	2.22166
2009	2.74129
2010	3.4044
2011	3.18545
2012	3.25225
2013	3.05799
2014	2.34148
2015	2.06159
2016	1.55353
2017	1.18474