Year % 2001 0 2006 4.554924 2007 14.72964 2008 14.04759 2009 8.267271 2010 2.638101 2011 7.870423 2012 1.861004 2013 7.322891 2014 7.959148 2015 6.430116 2016 6.804557 2017 7.397465 2018 1.968317 2019 2.243273 2020 2.252819 2021 2.373122