Year	Percent
1996	7.96
1997	6.45
1998	8.05
2000	3.44
2001	3.09
2003	4.16
2004	3.75
2005	3.04
2006	2.56
2007	2.38
2008	2.83
2009	3.91
2010	3.36
2011	2.85
2012	2.53
2013	2.35
2014	2.71
2015	2.95
2016	3.89
2017	3.37
2018	3.13
2019	3.38
2020	6.12