Year % (cumulative) 2001 11.141544342041 2002 11.3290405273438 2003 11.5626335144043 2004 11.7171411514282 2005 12.0712127685547 2006 12.4796562194824 2007 12.9234228134155 2014 22.8657302856445 2015 20.6825408935547 2016 19.8245906829834 2018 20.1211109161377 2020 20.5417308807373