Year % 1988 1.387572 1993 0.1000189 1995 0.3200378 1996 0.0536419 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0 2003 0 2004 0 2005 0 2006 0 2007 0.0940633 2008 0.0996308 2009 0.1127769 2010 0 2011 0 2012 0 2013 0 2014 0 2015 0 2016 0 2017 0 2018 0 2019 0 2020 0.9422821 2021 0.001633