Year % 2000 12.33 2001 11.47 2004 10.89 2005 12.1 2006 13.02 2007 13.26 2008 12.63 2014 9.75 2015 10.2 2016 7.7 2017 7.65 2018 7.65 2019 8.44 2020 8.45 2021 8.7