Year % (cumulative) 2006 0 2007 0 2008 0 2009 0 2010 0 2011 18.6352195739746 2012 13.7532272338867 2013 14.6646356582642 2014 18.5495700836182 2015 19.8022193908691 2016 20.8690204620361 2017 21.9999008178711 2018 23.3737602233887 2019 24.5931396484375 2020 25.9768943786621 2021 27.2983646392822 2022 28.564733505249