Year	Percent
1993-01-01	11.4637
1994-01-01	12.8553
1995-01-01	15.5988
1996-01-01	16.3009
1997-01-01	17.7470
1998-01-01	19.3521
1999-01-01	17.6018
2000-01-01	18.4065
2001-01-01	19.5938
2002-01-01	21.6282
2003-01-01	24.2184
2004-01-01	25.2911
2005-01-01	27.2790
2006-01-01	30.3072
2007-01-01	33.9780
2008-01-01	34.9434
2009-01-01	43.3208
2010-01-01	43.1775
2011-01-01	44.1355
2012-01-01	44.8074
2013-01-01	47.6813
2014-01-01	50.3493
2015-01-01	57.9654
2016-01-01	59.8523