Year	Percent
1999-01-01	10.2099
2000-01-01	8.8821
2001-01-01	11.0889
2002-01-01	15.3186
2003-01-01	28.1096
2004-01-01	27.2738
2005-01-01	29.0988
2006-01-01	30.2832
2007-01-01	40.3538
2008-01-01	20.5093
2009-01-01	44.2798
2010-01-01	46.2783
2011-01-01	32.8881
2012-01-01	36.9205
2013-01-01	39.4129
2014-01-01	45.0342
2015-01-01	46.1493
2016-01-01	45.2001