Year	Percent
2001	25.42477
2002	34.34989
2003	47.10911
2004	43.04587
2005	28.37778
2006	21.79984
2008	15.15406
2009	15.55413
2010	12.44074
2011	9.25467
2012	8.39031
2013	8.77186
2014	10.81858
2015	11.11475
2017	10.50723