Year	Percent
1995-01-01	26.620
1996-01-01	28.270
1997-01-01	32.630
1998-01-01	26.905
1999-01-01	30.840
2000-01-01	33.050
2001-01-01	36.220
2002-01-01	40.890
2003-01-01	36.460
2004-01-01	34.480
2005-01-01	33.780
2006-01-01	48.480
2007-01-01	47.960
2008-01-01	29.990
2009-01-01	35.180
2010-01-01	38.210
2011-01-01	40.060
2012-01-01	36.340
2013-01-01	23.380
2014-01-01	22.410
2015-01-01	20.070