Year % (cumulative) 2006 0 2007 0 2008 0 2009 0 2010 0 2011 18.4886302947998 2012 13.7938146591187 2013 14.859447479248 2014 17.5211791992188 2015 17.960729598999 2016 18.2935199737549 2017 19.2480907440186 2018 20.2792091369629 2019 20.9740905761719 2020 21.0651302337646 2021 21.4944400787354 2022 22.8654556274414