Year	Percent
2000	45.44604
2001	81.16965
2002	79.58531
2003	43.69879
2004	43.30715
2005	47.42298
2006	48.80058
2007	47.06707
2008	34.95771
2009	29.83012
2010	27.09027
2011	30.43985
2012	30.16179
2013	38.61855
2014	42.29232
2015	47.437
2016	43.55233
2017	42.98772