Year Percent of GDP 1980 47.384 1981 33.299 1982 29.024 1983 28.977 1984 25.192 1985 28.182 1986 25.324 1987 38.753 1988 28.635 1989 24.044 1990 19.309 1991 18.216 1992 19.781 1993 21.326 1994 22.249 1995 23.69 1996 26.837 1997 26.313 1998 28.959 1999 33.614 2000 33.718 2001 30.018 2002 34.261 2003 29.813 2004 32.255 2005 32.834 2006 31.894 2007 30.618 2008 29.627 2009 31.688 2010 33.908 2011 30.915 2012 28.7 2013 30.63 2014 30.17 2015 30.17 2016 28.189 2017 28.801 2018 28.271 2019 28.657 2020 29.369 2021 29.58 2022 30.068 2023 30.08 2024 30.089