Year	Percent
2002	58.36
2003	65.72
2006	59.73
2007	57.72
2008	56.37
2009	55.1
2010	53.66
2011	55.27
2012	53.91
2013	51.91
2014	53.1
2015	47.34
2016	48.23
2017	46.73
2018	45.43
2019	35.57
2020	36.98