Year	Percent
2001	43.42837
2002	45.19093
2003	49.48714
2004	44.74665
2005	45.17348
2006	58.91847
2007	59.39217
2008	66.31009
2009	59.31178
2010	62.3345
2011	62.0693
2012	56.81647
2013	54.46356
2014	53.57199
2015	48.541
2016	43.18904
2017	41.85376