Year % of total 1990 0 1991 0 1992 0 1993 0 1994 0 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0 2003 0 2004 0.0032041012495994873 2005 0.0032298698362455995 2006 0.009430700072302033 2007 0.04712683401929058 2008 0.09700981511070532 2009 0.2008164340268633 2010 0.2435879065768735 2011 0.2981366459627329 2012 0.3279327250884769 2013 0.40625892658774243 2014 0.37426227148409386 2015 0.5017311190657825