Year % (cumulative) 2009 34.7570991516113 2010 39.2407608032227 2011 40.3003463745117 2012 38.1876907348633 2013 41.7883949279785 2014 38.9253196716309 2015 39.6257095336914 2018 42.7401695251465 2019 42.379150390625