Year Percent of GDP (Units) 1980 14.590 1981 21.377 1982 17.766 1983 17.804 1984 17.307 1985 15.415 1986 10.557 1987 13.081 1988 10.205 1989 8.916 1990 8.845 1991 10.134 1992 3.888 1993 2.835 1994 4.040 1995 7.458 1996 7.321 1997 10.266 1998 12.528 1999 15.522 2000 16.382 2001 18.035 2002 17.245 2003 19.036 2004 18.258 2005 21.472 2006 20.775 2007 24.618 2008 26.227 2009 20.397 2010 20.087 2011 21.000 2012 24.624 2013 24.066 2014 25.881 2015 25.833 2016 25.362 2017 29.816 2018 32.648 2019 31.965 2020 35.158 2021 36.651 2022 46.784 2023 45.860 2024 39.453 2025 36.435 2026 35.580 2027 35.318 2028 35.426 2029 35.234