Year % of GDP 1990 6.318516723260577 1991 5.954364809238645 1992 8.141650242873629 1993 5.59815388899462 1994 3.5876542219864764 1995 6.5057725922091 1996 11.127303955817817 1997 11.701915753605412 1998 7.510654797016918 1999 9.147611729845762 2000 10.501046545957722 2001 10.715268252349745 2002 13.140325440314912 2003 14.830252246996487 2004 17.37635636063382 2005 19.553973229366644 2006 21.565568416899307 2007 22.62964682493313 2008 23.876188787450573 2009 19.15944660811532 2010 23.57461455748848 2011 24.006328231927416 2012 21.494463494262792 2013 19.127783541633022 2014 19.702929262118634 2015 16.626506684175215 2016 18.897143992769966 2017 20.26817589926474 2018 20.062519701639616 2019 21.16327638789169 2020 20.850577194296253 2021 20.032437854405497 2022 19.055524811247746 2023 18.593944201011933