Year	Percent
2006	22.94275
2007	12.81078
2008	23.42187
2009	23.81053
2010	23.78908
2011	23.64876
2012	23.11478
2013	23.50358
2014	22.11405
2015	23.78458
2016	23.79718
2017	26.28077