Year % 2004 6.8 2005 6.8 2006 6.8 2007 7.01 2008 7.01 2009 7.01 2010 7.01 2011 7.01 2012 7.01 2013 7.01 2014 7.01 2015 6.85 2016 6.85 2017 6.88 2018 6.88 2019 6.88 2020 6.88 2021 6.88