Year Percent of GDP (Units) 1980 10.585 1981 8.576 1982 7.906 1983 6.236 1984 5.431 1985 4.828 1986 7.545 1987 12.295 1988 12.016 1989 19.780 1990 21.212 1991 21.410 1992 22.204 1993 20.499 1994 8.487 1995 12.741 1996 13.566 1997 12.161 1998 12.987 1999 12.863 2000 16.064 2001 18.172 2002 20.008 2003 21.766 2004 24.879 2005 27.254 2006 25.605 2007 22.520 2008 28.208 2009 27.716 2010 23.404 2011 21.135 2012 25.694 2013 27.113 2014 28.407 2015 25.458 2016 28.439 2017 29.810 2018 28.150 2019 32.081 2020 36.416 2021 37.147 2022 33.631 2023 33.099 2024 34.265 2025 35.377 2026 36.128 2027 37.384 2028 38.873 2029 39.646