Year % of GDP 1981 23.870883576668493 1982 26.258757469989902 1983 26.608171082902004 1984 29.179612562731847 1985 26.72974898450689 1986 30.178208606498817 1987 30.803297142428594 1988 28.448988419240106 1989 22.48677566702604 1990 18.27470167885898 1991 54.06845984297433 1992 28.932993251088384 1993 59.33218993542969 1994 44.63069350816739 1995 40.541372125105354 1996 35.52432563944355 1997 52.666345082748066 1998 47.84351451264182 1999 50.15844061540753 2000 53.996751465861195 2001 50.31834099200475 2002 50.72661597844075 2003 52.352049532945124 2004 60.78777491895012 2005 58.76938379346021 2006 59.443265077556006 2007 59.61444843214817 2008 54.017035917031166 2009 50.27799932785912 2010 46.67898258370723 2011 52.553555045629565 2012 43.57215119425203 2013 38.890237481919584 2014 52.24899869422773 2015 44.18405023468281 2016 50.87219405581398 2017 59.166679267025344 2018 58.16478227692643 2019 59.21723318065395 2020 57.66034973409949 2021 58.54886395409158 2022 65.06135115586146 2023 78.01458217291004