Year	Percent
1996	2.81368
1997	2.12825
1998	2.09824
1999	1.71382
2000	1.85082
2001	6.1004
2002	2.6456
2003	2.3417
2004	2.3801
2005	2.02926
2006	1.83654
2007	1.95007
2008	1.74234
2009	1.68816
2010	1.38215
2011	1.26219
2012	1.22532
2013	1.16944
2014	1.09296
2015	0.9947
2016	0.94463
2017	0.98259