Year Percent 1992-01-01 0.010968000000000000 1993-01-01 0.014147000000000000 1994-01-01 0.018688000000000000 1995-01-01 0.018557000000000000 1996-01-01 0.019469000000000000 1997-01-01 0.021029000000000000 1998-01-01 0.026857000000000000 1999-01-01 0.026739999999999996 2000-01-01 0.016610000000000000 2001-01-01 0.016392000000000000 2002-01-01 0.019979000000000000 2003-01-01 0.005443000000000000 2004-01-01 0.005443000000000000 2005-01-01 0.015697000000000000 2006-01-01 0.015436000000000002 2007-01-01 0.020978000000000000 2008-01-01 0.030473000000000000 2009-01-01 0.062319000000000006 2010-01-01 0.049211000000000005 2011-01-01 0.036050000000000000 2012-01-01 0.032281000000000000 2013-01-01 0.030255000000000000 2014-01-01 0.031993000000000000 2015-01-01 0.042754000000000000 2016-01-01 0.043818000000000000