Year Percent of GDP (Units) 1980 22.563 1981 22.563 1982 22.563 1983 22.563 1984 30.689 1985 23.880 1986 8.545 1987 19.567 1988 11.989 1989 13.938 1990 15.424 1991 24.122 1992 29.917 1993 22.341 1994 24.749 1995 21.287 1996 21.883 1997 23.968 1998 23.927 1999 15.314 2000 16.576 2001 15.347 2002 23.348 2003 23.736 2004 20.520 2005 26.736 2006 30.387 2007 34.713 2008 34.948 2009 26.145 2010 27.286 2011 22.403 2012 28.146 2013 25.941 2014 26.845 2015 25.531 2016 29.154 2017 32.943 2018 35.264 2019 32.638 2020 35.095 2021 25.585 2022 26.698 2023 28.490 2024 28.763 2025 29.591 2026 30.424 2027 31.133 2028 32.033 2029 32.032