Year % 1994 26.27 1999 28.01 2001 11.23 2002 13.43 2003 11.73 2004 11.57 2005 11.76 2006 11.61 2007 11.4 2008 4.97 2009 11.08 2010 6.39 2012 4.09 2013 5.79 2014 6.36 2015 7.4 2016 7.08 2017 7.07 2018 13.03 2019 5.98 2020 6.78 2021 6.68