Year % 1993 90.34248 1997 34.55314 2001 38.9244 2002 38.22985 2003 35.29566 2004 38.02538 2005 34.01817 2006 37.21247 2007 34.63133 2008 50.95691 2009 52.14585 2010 26.0417 2011 49.00702 2012 25.50897 2013 48.74349 2015 25.34996 2016 27.10561 2018 26.01051 2020 26.35534 2021 26.2026