Year	Percent
2000	16.02
2001	31.61
2002	39.05
2003	35.8
2004	35.95
2005	32.25
2006	30.13
2007	31.35
2008	37.74
2009	34.45
2010	36.68
2011	31.73
2012	35.2
2013	37.68
2014	36.71
2015	37.45
2016	38.62
2017	41.86
2018	42.2
2019	40.16
2020	42.08