Year % (cumulative) 1991 9.59595966339111 2001 11.8211097717285 2006 0 2007 0 2008 0 2009 0 2010 0 2011 20.6529293060303 2012 17.1679096221924 2013 17.8810997009277 2014 18.294059753418 2015 19.204460144043 2016 19.8435497283936 2017 20.8929805755615 2018 22.1553707122803 2019 23.034309387207 2020 23.8291244506836 2021 24.6748828887939 2022 25.9917182922363