Year Percent of GDP 1990 39.281 1991 34.946 1992 41.165 1993 37.732 1994 33.794 1995 32.413 1996 33.342 1997 35.598 1998 34.531 1999 30.315 2000 33.133 2001 36.939 2002 35.864 2003 33.116 2004 31.094 2005 28.151 2006 27.269 2007 29.453 2008 26.68 2009 37.066 2010 33.012 2011 32.843 2012 33.233 2013 35.527 2014 40.214 2015 40.811 2016 38.682 2017 33.305 2018 35.116 2019 39.192 2020 38.14 2021 37.831 2022 36.874 2023 36.024 2024 35.445