Year % of GDP 1993 18.748211251776368 1994 16.652120591628215 1995 16.238177392053903 1996 15.296063151392234 1997 15.084646356411694 1998 14.367270326213562 1999 14.870063378196818 2000 14.474986055754352 2001 14.741466682899556 2002 14.564831723140475 2003 14.985804610809748 2004 15.40646666495627 2005 14.484686363316786 2006 14.222229522886781 2007 14.611690067166158 2008 13.673092810535117 2009 13.570221934491897 2010 13.650757475199542 2011 14.520263405937934 2012 14.928763446119653 2013 15.081161076380264 2014 14.429654058686086 2015 14.76956045538332 2016 14.912777553210185 2017 15.005528550349725 2018 14.83340328652476 2019 14.768769668918127 2020 14.36691503488009 2021 13.357322003949438 2022 13.132133209130389