Year	Percent
1999	11.14
2000	8.46
2001	7.29
2002	6.8
2003	7.95
2004	8.17
2005	7.29
2006	7.38
2007	5.07
2008	3.98
2009	6.4
2010	7.45
2011	6.68
2012	5.58
2013	5.1
2014	3.73
2015	4.7
2016	4.02
2017	4.1
2018	4.11
2019	5.1
2020	3.82