Year	Percent
1999-01-01	1.599316001
2000-01-01	2.148835659
2001-01-01	1.673203230
2002-01-01	2.246644735
2003-01-01	2.525825739
2004-01-01	2.691640615
2005-01-01	2.390195370
2006-01-01	3.256787539
2007-01-01	3.144784927
2008-01-01	1.491920114
2009-01-01	1.269968510
2010-01-01	1.338256955
2011-01-01	1.228224277
2012-01-01	1.167804480
2013-01-01	1.076766372