Year % of GDP 1976 -0.8409066159957649 1977 10.03992260674372 1978 5.704443542750048 1979 7.07628151550278 1980 8.332931313629592 1981 21.143182052384535 1982 23.52848224680667 1983 23.09953972104343 1984 16.294890536617824 1985 21.520293642930103 1986 22.776064567847758 1987 22.62537719149594 1988 22.195895840522596 1989 22.346168014549725 1990 23.024411863470483 1991 22.560405924653214 1992 21.994003830074575 1993 20.901202135504953 1994 22.417160059284477 1995 22.146154490517883 1996 23.138794083200352 1997 24.397478698651984 1998 25.834054726151884 1999 26.65995681537932 2000 27.7974576904575 2001 28.422290432944404 2002 30.749176431081825 2003 30.164596698861047 2004 31.57740066817656 2005 32.35940723798792 2006 35.34119099357112 2007 36.317462583268195 2008 37.381877788254556 2009 38.976393888328666 2010 38.78177386261439 2011 38.05948973986807 2012 40.59957949492928 2013 39.74538771743852 2014 37.77923222413316 2015 36.73095602529318 2016 37.28029922214067 2017 35.28520314023101 2018 35.459039521705456 2019 36.35360240711669 2020 37.188866209057345 2021 36.051174245432364 2022 33.9494644149112 2023 34.904359882013274