Year % 2000 4.02 2001 3.85 2002 3.85 2003 3.85 2004 3.85 2007 3.19 2008 3.19 2009 3.19 2010 2.54 2013 2.32 2016 2.32 2017 2.32 2018 2.25 2019 2.25 2020 2.25 2021 2.25