Year % 1988 0.0177651 1989 0 1990 1.126858 1992 1.119449 1993 0.0983599 1994 0.098297 1995 0.0978115 1996 0.0775946 1997 0.0774643 1998 0.0298641 1999 0 2000 0 2001 0 2002 0 2003 0 2004 0 2005 0 2006 0 2007 0 2008 0 2009 0 2010 0 2011 0 2012 0 2013 0 2015 0 2016 0 2017 0 2018 0 2019 0 2020 0 2021 0