Year % 2000 14.06 2001 12.97 2004 10.96 2005 9.95 2006 9.22 2007 8.09 2008 13.15 2014 3.38 2015 2.35 2016 1.65 2017 1.48 2018 0.73 2019 0.76 2020 0.97 2021 1.12