Year % 1993 35.28262 2000 37.79853 2001 41.20299 2002 41.24381 2003 41.24381 2007 40.81328 2008 40.54438 2009 39.92414 2010 41.86233 2013 40.95909 2016 41.84731 2017 43.20075 2018 44.27665 2019 44.58338 2020 45.15348 2021 45.15348