Year Percent of GDP (Units) 1980 12.119 1981 8.110 1982 6.419 1983 6.403 1984 1.916 1985 5.674 1986 9.836 1987 5.413 1988 10.940 1989 6.102 1990 11.355 1991 12.146 1992 8.538 1993 6.556 1994 13.027 1995 5.694 1996 10.257 1997 7.962 1998 8.883 1999 5.811 2000 8.516 2001 10.045 2002 8.709 2003 9.026 2004 7.009 2005 14.045 2006 14.525 2007 13.270 2008 16.042 2009 10.533 2010 18.233 2011 13.300 2012 17.481 2013 16.860 2014 19.015 2015 16.878 2016 17.080 2017 14.725 2018 16.340 2019 17.986 2020 18.006 2021 17.751 2022 15.182 2023 11.743 2024 19.013 2025 20.330 2026 20.283 2027 19.405 2028 19.952 2029 20.065