Year % of GDP 1992 43.25430036732363 1993 37.26128499091382 1994 30.09513298888985 1995 32.01356199549981 1996 30.830219242043416 1997 20.49937041245662 1998 20.500607983007548 1999 20.60037770240433 2000 18.69999385673916 2001 18.500010151665887 2002 18 2003 17.4 2004 16.2 2005 15.900002512026326 2006 15.298060582535303 2007 15.609081234480312 2008 15.92848821395029 2009 15.47120440055412 2010 12.50527682900287 2011 11.96847550647286 2012 12.364388188624357 2013 13.320391237242065 2014 13.245194591343315 2015 13.616882159429988 2016 14.139970579448654 2017 12.59554499541771 2018 13.434606820153963 2019 16.151976546779515 2020 16.154185855080158 2021 16.585700531458116 2022 16.630417546363304 2023 16.144459071404192