Year % 1995 32.72 1996 31.26 1997 31.56 1998 31.16 1999 29.09 2000 20.26 2001 20.54 2002 19.85 2004 18.81 2005 5.75 2006 3.2 2007 3.22 2008 3.06 2009 1.54 2010 1.54 2011 2.21 2012 1.95 2013 1.89 2014 1.24 2015 1.22 2016 1.22 2017 0.78 2018 0.77 2019 0.77 2020 0.77 2021 0.77