Year	Percent
2004	10.22
2005	8.62
2006	7.25
2008	4.65
2009	5.08
2010	4.53
2011	4.14
2012	4.17
2013	3.76
2014	3.57
2017	4.29
2018	5.07
2019	5.53
2020	8.29