Year % 1996 19.43 1999 23.33 2000 19.98 2001 32.03 2002 41.45 2003 42.77 2004 23.43 2006 9.98 2007 21.92 2010 21.51 2011 12.42 2012 7.6 2013 16.24 2020 19.33 2021 20.18