Year % (cumulative) 1991 15.17160987854 2001 26.3369903564453 2006 30.067720413208 2007 30.5611305236816 2008 32.0350341796875 2009 40.2813339233398 2010 40.9447784423828 2011 42.1696243286133 2012 44.0390510559082 2013 44.3588371276855 2014 48.6274604797363 2015 43.9635238647461 2016 44.3591651916504 2017 40.1260833740234 2018 44.3945579528809 2019 46.7261657714844 2020 46.7012252807617 2021 49.5096054077148 2022 51.3443222045898