Year	Percent
1995-01-01	5.800932407
1996-01-01	7.519738197
1997-01-01	7.487412453
1998-01-01	6.171125412
1999-01-01	6.122104168
2000-01-01	5.487185478
2001-01-01	5.745839596
2002-01-01	6.227642536
2003-01-01	6.672718525
2004-01-01	9.449205399
2005-01-01	10.691459660
2006-01-01	16.157840730
2007-01-01	25.758869170
2008-01-01	29.118824010
2009-01-01	33.736476900
2010-01-01	29.952863690
2011-01-01	24.766899110
2012-01-01	24.459836960
2013-01-01	19.343681340