Year	Percent
2004	8.12
2005	6.63
2009	8.36
2010	7.59
2011	7.12
2012	6.94
2013	6.69
2014	8.36
2015	8.47
2016	8.7
2017	9.31
2018	8.72
2019	7.97
2020	9.25