Year % of GDP 1990 15.039748869331559 1991 15.102016282087524 1992 16.43694073903578 1993 16.570142361224566 1994 18.9582806033336 1995 17.437504353084993 1996 18.692455359779284 1997 17.79622916921682 1998 20.049264488365136 1999 20.172702041669133 2000 20.12784658933868 2001 19.86974815070805 2002 19.429167638745177 2003 20.84160618289383 2004 21.577392067256383 2005 21.573644792685425 2006 21.592481138919222 2007 22.38537594030338 2008 23.53772323538566 2009 22.44333573997999 2010 23.8599771161889 2011 24.090684659649227 2012 25.2071094688132 2013 26.63164568912651 2014 27.075008720690324 2015 26.65204707943516 2016 26.185683193351544 2017 25.558955581390858 2018 25.8381632414224 2019 25.664752869231478 2020 24.50755425659206 2021 24.52206392776293 2022 24.57797275216995 2023 22.77435937891197