Year % (cumulative) 2002 13.2008399963379 2007 9.38823795318604 2008 14.8457202911377 2009 15.3599901199341 2010 15.721360206604 2011 18.2011108398438 2012 17.2563953399658 2013 18.215030670166 2014 18.9766292572021 2015 19.9578895568848 2016 20.6914501190186 2017 20.7765407562256 2018 21.4781627655029 2019 21.7018299102783 2020 22.0595359802246 2021 22.4689598083496 2022 22.5447597503662