Year Percent of GDP 1980 21.622 1981 20.231 1982 20.216 1983 21.169 1984 21.849 1985 22.217 1986 23.769 1987 22.971 1988 24.13 1989 25.444 1990 24.433 1991 24.161 1992 23.77 1993 22.574 1994 22.334 1995 22.498 1996 22.061 1997 22.275 1998 22.631 1999 22.059 2000 22.174 2001 21.951 2002 21.805 2003 21.099 2004 23.578 2005 23.41 2006 25.454 2007 27.499 2008 26.455 2009 23.808 2010 25.241 2011 27.184 2012 26.325 2013 26.238 2014 27.087 2015 28.136 2016 28.168 2017 28.063 2018 28.559 2019 28.165 2020 28.324 2021 28.364 2022 28.53 2023 28.627 2024 28.692