Year % 1999 0 2000 0 2001 0 2002 0 2003 0 2004 0 2005 0 2006 0 2007 2.672247 2008 2.672247 2009 0.5141388 2010 0.4698972 2011 1.919123 2013 1.188028 2015 2.141983 2017 14.03859 2018 8.049404 2019 7.300509 2020 7.308341 2021 6.88351