Year	Percent
1999	9.34
2000	6.53
2001	6.69
2002	7.98
2003	7
2004	7.39
2005	7.8
2007	8.11
2008	11.09
2009	12.23
2010	14.46
2011	12.18
2012	15.49
2013	12.24
2014	11.53
2015	11.65
2016	11.17
2017	8.61
2018	7.83
2019	6.44
2020	12.4