Year % (cumulative) 2004 23.5852203369141 2005 23.4362106323242 2006 25.2942295074463 2007 27.9847393035889 2008 29.2930698394775 2009 28.7936000823975 2010 30.4452495574951 2011 29.3516807556152 2012 34.502498626709 2013 34.5527305603027 2014 36.3177108764648 2015 35.9550399780273 2016 38.2972793579102 2017 38.2888603210449 2018 40.0167198181152 2019 40.933952331543 2020 41.015308380127 2021 42.8271751403809 2022 43.9064750671387