Year % 1994 12.85 1996 16.69 1997 19.67 1998 6.55 2000 10.64 2001 8.97 2003 11.2 2006 6.04 2008 5.68 2009 9.13 2010 5.98 2011 6.04 2012 5.69 2013 2.75 2014 2.84 2015 2.84 2016 4.11 2019 7.08 2020 8.65 2021 9.04