Year	Percent
1995-01-01	19.3484
1996-01-01	30.2961
1997-01-01	38.5686
1998-01-01	43.7888
1999-01-01	35.8536
2000-01-01	24.3669
2001-01-01	22.3850
2002-01-01	21.3483
2003-01-01	21.7717
2004-01-01	23.2874
2005-01-01	24.0848
2006-01-01	24.1426
2007-01-01	21.3451
2008-01-01	18.6865
2009-01-01	17.4317
2010-01-01	15.6109
2011-01-01	15.0159
2012-01-01	15.7574
2013-01-01	15.6359
2014-01-01	14.7198