Year Percent 1995-01-01 1.485631000000000 1996-01-01 9.670613000000001 1997-01-01 99.349790000000000 1998-01-01 47.838260000000000 1999-01-01 38.192740000000000 2000-01-01 19.355030000000000 2001-01-01 16.074760000000000 2002-01-01 8.487392000000000 2003-01-01 7.558540000000000 2004-01-01 11.706850000000000 2005-01-01 10.113260000000000 2006-01-01 7.720629000000000 2007-01-01 9.399536999999999 2008-01-01 5.375655000000000 2009-01-01 12.803770000000000 2010-01-01 12.503710000000000 2011-01-01 20.166330000000000 2012-01-01 12.269340000000000