Year Percent of GDP 1981 14.191 1982 13.044 1983 11.655 1984 13.434 1985 11.49 1986 12.076 1987 10.974 1988 11.356 1989 12.836 1990 13.813 1991 15.455 1992 18.833 1993 18.958 1994 20.358 1995 20.944 1996 15.355 1997 15.083 1998 18.651 1999 17.301 2000 17.669 2001 17.714 2002 17.065 2003 18.429 2004 18.141 2005 18.605 2006 20.075 2007 20.8 2008 20.173 2009 14.055 2010 16.672 2011 17.79 2012 17.71 2013 17.019 2014 16.397 2015 16.017 2016 15.952 2017 16.319 2018 20.13 2019 18.553 2020 16.518 2021 16.482 2022 16.426 2023 16.377 2024 16.483