Year % of GDP 1995 3.884599685619252 1996 4.388975537762442 1997 4.30221003412496 1998 4.150411965618272 1999 3.8173782110141796 2000 3.7453056335484547 2001 3.677640147619163 2002 3.489017439750678 2003 3.431156249922096 2004 3.128327032696986 2005 2.7690522635834958 2006 2.4116801467987883 2007 2.507951826944444 2008 2.368456866397907 2009 2.2654520664008913 2010 2.431134632039071 2011 2.3732729940785684 2012 2.4082924709825586 2013 2.621495340837503 2014 2.535231181629428 2015 2.7340894840143513 2016 2.8242493853304858 2017 2.7870299322489958 2018 2.7562197898591116 2019 2.468942516055633 2020 2.8115030249953086 2021 2.7307758387943943 2022 2.3383495113181523 2023 2.3421750899008065