Year % 2001 0 2002 7.931035 2004 4.065041 2005 7.971014 2006 4.672897 2007 4.383562 2008 6.179775 2009 4.020101 2010 4.538578 2011 6.226415 2012 6.220096 2013 1.771654 2014 0 2015 1.592357 2016 1.677682 2017 0.8583691 2018 1.200218 2019 1.435407 2020 0.9247028 2021 0.8123477