Year % (cumulative) 2001 10.44264793396 2002 10.5623445510864 2003 10.7822494506836 2004 11.0801572799683 2005 11.7091865539551 2006 12.5300130844116 2007 12.7108364105225 2014 22.7862701416016 2015 21.3045806884766 2016 20.6339893341064 2018 21.3097190856934 2020 21.6056900024414