Year % 2001 8.424678621747871 2002 9.24797720943196 2003 9.442242741188647 2004 10.626298945824711 2005 7.330797305910676 2006 6.091370407093719 2007 4.807761651857756 2008 5.983092415895329 2009 5.832840696005383 2010 6.255193739253359 2011 6.348198362228411 2012 7.085007345143703 2013 6.376581989335948 2014 10.952915941942436 2015 13.055967700261922 2016 12.123385121008388 2017 14.358275314502475 2018 11.829772444502524 2019 10.507052143507083 2020 11.257687685881583 2021 17.171829083740743 2022 13.143246976036286 2023 11.278450636069651