Year % of GDP 1990 21.939953810623557 1991 22.22222222222222 1992 25 1993 33.90862944162436 1994 33.260270893047824 1995 24.697906970997423 1996 21.079134065544544 1997 25.231033448736472 1998 25.934650315241093 1999 26.32697127357518 2000 25.201548096082682 2001 22.669042461509793 2002 21.984742695584643 2003 23.748249682755 2004 25.317352045735504 2005 26.51662668230181 2006 29.660766775581266 2007 31.376324675578626 2008 33.3037472609769 2009 35.537432622546206 2010 38.82708437704219 2011 37.68588585656398 2012 33.416110209933336 2013 37.18684605446492 2014 33.224537410491564 2015 28.654209765320875 2016 25.439973038157326 2017 26.158414343533682 2018 26.22710922171354 2019 27.034409049075204 2020 25.365179233374075 2021 22.571362343749115 2022 19.447716281014344 2023 21.851843796607408