Year % 2005 5.81822540668461 2008 5.87375878453383 2009 7.15060241596615 2010 7.20044556619603 2011 7.38675722976325 2012 7.97466630039857 2013 7.56089897018663 2014 7.68843525323845 2015 7.67578361556107 2016 7.32132188353974 2017 7.46188333876709 2018 7.35267808828275 2019 7.25977679932904 2020 7.28797365139008 2021 7.59887163228419 2022 7.27279899697618