Year Percent of GDP (Units) 1980 17.424 1981 21.082 1982 25.384 1983 30.049 1984 32.449 1985 33.771 1986 36.592 1987 33.831 1988 28.491 1989 22.396 1990 19.101 1991 17.296 1992 19.394 1993 23.668 1994 29.581 1995 34.295 1996 39.122 1997 44.923 1998 54.211 1999 63.403 2000 67.769 2001 74.571 2002 83.505 2003 89.534 2004 94.205 2005 94.056 2006 93.138 2007 94.401 2008 105.661 2009 120.292 2010 128.896 2011 139.919 2012 143.992 2013 142.752 2014 144.937 2015 144.447 2016 149.496 2017 148.072 2018 151.144 2019 151.694 2020 161.984 2021 156.415 2022 150.327 2023 155.903 2024 157.709 2025 155.735 2026 154.149 2027 153.327 2028 152.855 2029 152.868