Year % 1990 24.46 1993 26.55 1994 27.07 1997 21.51 1998 6.7 2000 5.43 2001 5.08 2003 5.46 2004 6.28 2005 6.71 2006 6.8 2007 6.41 2008 6.48 2009 5.72 2010 5.95 2011 5.99 2012 5.51 2014 5.51 2015 3.49 2017 6.04 2018 10.27 2019 10.26 2020 4.19 2021 2