Year % of GDP 1994 19.8914280534601 1995 23.72624310772011 1996 30.31349365810985 1997 15.000000187500001 1998 32.88921843951609 1999 17.541990899839238 2000 15.564790891414154 2001 13.054252680353148 2002 13.645502836193574 2003 30.0309131413864 2004 26.60690111239671 2005 29.37042191756179 2006 26.263161094349634 2007 41.07014126482863 2008 44.74449238814985 2009 36.13309155220391 2010 49.63645613904032 2011 45.68252752537631 2012 37.54870237770048 2013 41.020083836179836 2014 41.85796127369243 2015 31.606863163507647 2016 31.968768060110442 2017 39.040857438430734 2018 37.36620088544456 2019 29.367492939024075 2020 29.88680580187263 2021 40.095481855503614 2022 48.23071711263145 2023 47.0152754036691