Year	Percent
1995	2.17
1996	3.36
1997	3.08
1998	3.75
1999	4.34
2001	4.29
2002	3.62
2003	4.02
2004	3.45
2005	3.41
2006	3.35
2007	3.05
2008	2.57
2009	3.2
2011	2.47
2012	2.69
2013	2.51
2014	2.52
2015	3.33
2016	5.12
2017	6.05
2018	6
2019	6.08
2020	7.36