Year % (cumulative) 1986 15.3000001907349 2004 34.962760925293 2007 38.3390197753906 2008 41.5142211914062 2009 43.2807006835938 2010 36.2555809020996 2011 35.1943092346191 2012 37.7520294189453 2013 38.5291290283203 2014 40.2263793945312 2015 37.7655601501465 2016 40.2464218139648 2017 41.0566215515137 2018 40.5323677062988 2019 39.5067825317383 2020 43.7482833862305 2021 46.0704536437988 2022 53.4377098083496