Year Percent of GDP 1980 23.001 1981 22.511 1982 22.294 1983 21.626 1984 19.967 1985 20.416 1986 21.037 1987 22.289 1988 24.199 1989 25.596 1990 25.877 1991 25.146 1992 23.156 1993 21.153 1994 21.07 1995 22.149 1996 21.957 1997 22.323 1998 23.722 1999 25.406 2000 26.579 2001 26.573 2002 26.901 2003 27.823 2004 28.753 2005 30.016 2006 31.296 2007 31.335 2008 29.595 2009 24.565 2010 23.549 2011 21.907 2012 19.994 2013 18.711 2014 19.452 2015 20.441 2016 20.437 2017 21.104 2018 21.902 2019 22.046 2020 22.118 2021 22.261 2022 22.273 2023 22.262 2024 22.236