Year % of population 2008 1.97089028838358 2009 3.18772645039981 2010 2.34627230956122 2011 2.94721679796262 2012 3.16272631011189 2015 4.29316244741565 2016 4.0645509111167 2017 3.83003280716803 2018 4.48978660211044 2019 4.7472706251431 2020 8.77693489615137