Year % (cumulative) 2006 0 2007 0 2008 0 2009 0 2010 0 2011 0 2012 0 2013 0 2014 15.6284103393555 2015 15.9920701980591 2016 16.2776508331299 2017 16.3954696655273 2018 15.9796895980835 2019 17.2583599090576 2020 18.7681198120117 2021 20.5389423370361 2022 20.2173175811768