Year % 2002 6.012793 2003 5.760188 2004 5.760188 2005 5.760188 2006 8.810916 2007 7.210032 2008 7.403685 2009 7.403685 2012 1.187151 2015 0.7147111 2016 0.9491525 2017 0 2020 0 2021 0