Year Percent of GDP 1980 17.722 1981 18.292 1982 19.733 1983 18.171 1984 19.238 1985 23.516 1986 25.6 1987 26.281 1988 28.952 1989 30.599 1990 41.539 1991 34.772 1992 34.433 1993 34.903 1994 35.59 1995 35.045 1996 34.692 1997 32.204 1998 32.644 1999 30.015 2000 30.051 2001 27.959 2002 26.578 2003 27.116 2004 27.792 2005 26.384 2006 28.055 2007 31.423 2008 28.546 2009 28.513 2010 28.724 2011 29.334 2012 27.597 2013 26.301 2014 27.656 2015 30.358 2016 32.629 2017 33.864 2018 32.745 2019 32.861 2020 32.435 2021 31.964 2022 31.982 2023 32.432 2024 33.163