Year % of GDP 1993 15.229190669915816 1994 11.662724621034656 1995 15.31387609816701 1996 19.789529180193362 1997 17.102011341736727 1998 15.944696233434788 1999 16.04911051134607 2000 26.036643079107304 2001 28.67374703565654 2002 33.79148559879329 2003 34.25755554241585 2004 34.8524802916349 2005 38.894500146793526 2006 44.097452848573106 2007 43.84466630359989 2008 45.39969403197395 2009 40.81425431748437 2010 43.807173123607384 2011 47.33293543725179 2012 43.54164582069612 2013 39.93005410582633 2014 40.8278193953176 2015 34.649459711187326 2016 33.82482970930029 2017 36.87607245034854 2018 39.58073794290053 2019 38.588982108995985 2020 34.25406096003024 2021 37.08936993197719 2022 39.7713983564918