Year Percent of GDP (Units) 1980 10.987 1981 10.291 1982 10.579 1983 10.603 1984 9.443 1985 9.325 1986 9.848 1987 9.488 1988 9.317 1989 9.601 1990 9.138 1991 8.862 1992 8.797 1993 9.739 1994 10.048 1995 10.462 1996 9.791 1997 9.889 1998 9.821 1999 8.658 2000 9.756 2001 10.730 2002 10.356 2003 10.152 2004 9.885 2005 10.263 2006 10.127 2007 9.627 2008 11.540 2009 10.576 2010 10.601 2011 11.534 2012 11.695 2013 12.088 2014 11.748 2015 11.503 2016 11.601 2017 12.235 2018 12.950 2019 13.552 2020 13.308 2021 12.967 2022 13.011 2023 12.934 2024 13.443 2025 13.855 2026 14.865 2027 14.993 2028 15.132 2029 15.168