Year % of GDP 1990 6.42100268859719 1991 5.61525495153814 1992 4.25041876046901 1993 2.46452375833154 1994 1.7512338730626 1995 1.94789863056824 1996 1.90360402371594 1997 2.30135514297654 1998 2.3218372451966602 1999 3.12403306903887 2000 2.70673279864922 2001 3.00874087986708 2002 2.61784537918538 2003 2.6249128826462202 2004 2.5275896811078 2005 2.6452053014553 2006 2.50124939843779 2007 2.61042455712992 2008 3.1372615742465997 2009 3.37436368373618 2010 3.51474397546307 2011 3.5745889549471 2012 3.16654259121144 2013 3.20641632429402 2014 4.3258672400794405 2015 4.52800016778678 2016 3.97104492479212 2017 3.52238850010305 2018 3.3326922839614603 2019 3.29742631401913 2020 3.48085709416735 2021 3.25048104938115 2022 3.0043137723859004