Year	Percent
1996	23.11
1997	11.49
1998	10.85
1999	8.31
2000	9.39
2001	12.19
2002	9.65
2003	10.12
2004	10.18
2005	8.94
2006	6.68
2007	4.47
2008	6.3
2009	13.79
2010	16
2011	14.94
2012	14.68
2013	10.51
2014	9.87
2015	9.28
2016	9.19
2017	8.26
2018	7.57
2019	6.61
2020	8.1