Year % 1994 17.69435 1999 27.36196 2001 32.76093 2002 31.50498 2003 34.21786 2004 30.88479 2005 30.45942 2006 30.65911 2007 32.55826 2008 18.2378 2009 18.23461 2010 22.5483 2012 15.61704 2013 19.60461 2014 19.51706 2015 18.78371 2016 19.74432 2017 19.93881 2018 15.11058 2019 13.83767 2020 13.62633 2021 8.455993