Year Percent of GDP 1980 9.385 1981 10.13 1982 13.38 1983 9.523 1984 8.282 1985 8.214 1986 11.249 1987 11.371 1988 12.232 1989 11.565 1990 12.859 1991 14.038 1992 13.117 1993 12.691 1994 12.1 1995 12.954 1996 12.769 1997 15.647 1998 15.465 1999 14.014 2000 11.977 2001 11.948 2002 15.875 2003 14.483 2004 17.491 2005 17.942 2006 17.463 2007 18.586 2008 17.51 2009 18.421 2010 17.593 2011 18.141 2012 18.876 2013 18.853 2014 18.032 2015 18.789 2016 18.413 2017 16.431 2018 15.24 2019 15.821 2020 16.533 2021 16.96 2022 17.545 2023 18.201 2024 18.983