Year	Percent
2002-01-01	11.2706
2003-01-01	11.1001
2004-01-01	13.3457
2005-01-01	17.3149
2006-01-01	29.9796
2007-01-01	48.9108
2008-01-01	55.1362
2009-01-01	51.2703
2010-01-01	47.2958
2011-01-01	47.0218
2012-01-01	50.4832
2013-01-01	50.6131
2014-01-01	52.5611
2015-01-01	55.7820
2016-01-01	56.5121