Year Percent of GDP 1980 26.896 1981 28.252 1982 28.514 1983 28.51 1984 29.171 1985 29.618 1986 29.609 1987 30.853 1988 30.924 1989 30.964 1990 31.95 1991 31.523 1992 31.436 1993 30.3 1994 29.574 1995 29.611 1996 29.477 1997 30.079 1998 29.05 1999 29.285 2000 28.302 2001 29.495 2002 28.521 2003 28.087 2004 28.883 2005 29.635 2006 30.584 2007 30.798 2008 30.433 2009 29.319 2010 29.015 2011 29.977 2012 30.76 2013 31.575 2014 33.253 2015 34.214 2016 34.253 2017 34.249 2018 33.859 2019 34.019 2020 34.622 2021 34.653 2022 34.658 2023 34.654 2024 34.655