Year % of GDP 1995 12.87458402197206 1996 12.222911299270322 1997 13.945145652766946 1998 15.959832276331726 1999 12.558831444280488 2000 18.357298125409468 2001 19.162417588619864 2002 20.182038851429002 2003 20.92875732045466 2004 20.69636273382303 2005 23.367842970994527 2006 19.173654764908083 2007 21.080512815442287 2008 23.19711641917742 2009 30.256372833430927 2010 22.1221941114024 2011 22.456203959878763 2012 23.885431470385527 2013 21.840101541737546 2014 22.21341332158298 2015 23.19129565350359 2016 22.737568851359075 2017 23.25740220195684 2018 23.023749154805802 2019 22.20165597196718 2020 24.310409998830323 2021 21.07110618401134 2022 21.504568054489827 2023 18.7821866397925