Year Percent of GDP 1991 31.665 1992 33.044 1993 28.405 1994 25.482 1995 27.29 1996 30.096 1997 33.092 1998 25.656 1999 24.323 2000 36.317 2001 33.033 2002 29.957 2003 34.315 2004 40.812 2005 46.138 2006 48.092 2007 41.237 2008 56.482 2009 31.682 2010 37.403 2011 44.397 2012 45.166 2013 41.166 2014 36.672 2015 24.972 2016 21.478 2017 24.069 2018 30.481 2019 31.256 2020 32.489 2021 30.619 2022 30.105 2023 29.535 2024 29.003