Year % of GDP 1976 26.6839426191578 1977 22.3880152996175 1978 20.2942039618489 1979 23.2971014492754 1980 19.5300834398829 1981 23.1506112745453 1982 29.5434307308283 1983 30.4942886338816 1984 27.0876350669722 1985 28.3269562720664 1986 25.8519401546739 1987 26.0782811886329 1988 30.9205101650702 1989 31.2996186232962 1990 24.5885747706668 1991 27.8248339927274 1992 26.8162847190894 1993 25.7322228352075 1994 26.3281529454385 1995 26.72642248782 1996 28.1789687612062 1997 31.0054031916408 1998 32.956748241745 1999 32.1564269133202 2000 29.9495461753497 2001 33.002805223347 2002 35.6484495870801 2003 38.7740933962809 2004 40.3406721915498 2005 40.2745719867504 2006 42.391125440732 2007 45.7370282157185 2008 49.5929662445684 2009 53.0810134987203 2010 50.118805416048 2011 47.9554965118963 2012 46.9101353503164 2013 45.1684789409513 2014 44.9703321615957 2015 45.8574620582704 2016 44.7155509865213 2017 44.3639034198616 2018 45.1949773349891 2019 45.8547194515803 2020 55.0663215128519 2021 47.6970078515581 2022 42.7284080848184 2023 39.1037823323175