Year	Percent
1999-01-01	5.74308
2000-01-01	7.41902
2001-01-01	7.66408
2002-01-01	9.88681
2003-01-01	12.72880
2004-01-01	16.92690
2005-01-01	17.29370
2006-01-01	18.07140
2007-01-01	16.77830
2008-01-01	11.65750
2009-01-01	18.17100
2010-01-01	20.52820
2011-01-01	19.15380
2012-01-01	26.80720
2013-01-01	25.49390
2014-01-01	22.87160
2015-01-01	24.32140
2016-01-01	23.27410