Year % of GDP 1993 27.862461807219496 1994 13.086442259736728 1995 11.376960924481606 1996 9.850046233454968 1997 10.345947011095047 1998 8.570489888006065 1999 13.582256158985444 2000 15.27038877163659 2001 17.123836100935787 2002 19.170322734165737 2003 21.070136128773935 2004 28.11035231062618 2005 27.20931380967549 2006 36.006048059277404 2007 36.03037891089569 2008 39.040880384467144 2009 44.023172115694074 2010 38.884379747538 2011 34.52967959170642 2012 33.92793510243365 2013 32.21786692412734 2014 32.26522127899425 2015 41.88880407517942 2016 42.15053622453272 2017 35.77921851128308 2018 33.66795125881436 2019 30.664842365347006 2020 35.26981690044415 2021 35.853152223874964 2022 33.051398183262 2023 32.11840454741349