Year % 2000 34.2 2001 35.88517 2004 28.98752 2005 23.32362 2006 20.14388 2007 18.63919 2008 34.28703 2014 7.028875 2015 7.442813 2016 1.736434 2017 1.792574 2018 1.796599 2019 3.107044 2020 3.064482 2021 3.789803