Year Percent 2000-01-01 0.001983000000000000 2001-01-01 0.005157000000000000 2002-01-01 0.008256000000000000 2003-01-01 0.013478000000000000 2004-01-01 0.015103000000000000 2005-01-01 0.023902000000000000 2006-01-01 0.039767000000000004 2007-01-01 0.050000000000000000 2008-01-01 0.060000000000000000 2009-01-01 0.119341000000000000 2010-01-01 0.110000000000000000 2011-01-01 0.110000000000000000 2012-01-01 0.147201000000000000 2013-01-01 0.170886999999999980 2014-01-01 0.146159999999999980 2015-01-01 0.119120000000000000