Year % of GDP 1996 16.895437508078068 1997 15.150716810467848 1998 13.259393480814799 1999 12.766595515726708 2000 12.245370753421257 2001 12.231045849565477 2002 12.804452789699571 2003 13.032309291110566 2004 12.22173589975876 2005 12.094588198848626 2006 11.118282221045837 2007 10.94811048735421 2008 10.443042951732382 2009 9.928277549204937 2010 9.071429861393291 2011 9.451541055212843 2012 9.544907696168046 2013 9.222610680211407 2014 9.210553243805562 2015 9.238687912469608 2016 7.78368506004979 2017 8.77075350749879 2018 9.057120818089656 2019 8.825634879137674 2020 9.428180923497157 2021 9.916045715038535 2022 9.723255695855064 2023 8.255286369414051