Year	Percent
1996-01-01	25.1564
1997-01-01	13.4692
1998-01-01	14.2871
1999-01-01	16.5334
2000-01-01	22.3511
2001-01-01	18.9998
2002-01-01	18.0559
2003-01-01	28.2844
2004-01-01	39.6722
2005-01-01	45.5105
2006-01-01	49.5452
2007-01-01	26.5218
2008-01-01	28.3615
2009-01-01	59.3822
2010-01-01	44.1202
2011-01-01	46.5193
2012-01-01	42.5111
2013-01-01	29.6199
2014-01-01	34.7393
2015-01-01	35.4331
2016-01-01	30.0686