Year Percent 1999-01-01 0.006813000000000000 2000-01-01 0.059063000000000000 2001-01-01 0.010971999999999999 2002-01-01 0.037607999999999996 2003-01-01 0.024111000000000000 2004-01-01 0.117318000000000000 2005-01-01 0.108280000000000000 2006-01-01 0.048595000000000000 2007-01-01 0.013224000000000001 2008-01-01 0.012837999999999999 2009-01-01 0.028043000000000002 2010-01-01 0.022890999999999998 2011-01-01 0.308994999999999960 2012-01-01 0.032099000000000000 2013-01-01 0.048681999999999996 2014-01-01 0.023105000000000000