Year Percent of GDP 1996 40.782 1997 46.503 1998 45.189 1999 39.191 2000 39.362 2001 37.824 2002 38.105 2003 32.88 2004 26.432 2005 20.467 2006 16.183 2007 14.249 2008 13.118 2009 28.113 2010 27.832 2011 29.387 2012 29.968 2013 31.712 2014 34.974 2015 39.545 2016 47.042 2017 48.29 2018 48.493 2019 47.952 2020 48.198 2021 48.539 2022 49.478 2023 49.962 2024 50.248