Year % of GDP 1988 42.618752751607275 1989 39.95207590785587 1990 43.53503344551275 1991 40.190446423632245 1992 40.94969559335138 1993 42.963086089284175 1994 42.99319753434088 1995 42.84086343704012 1996 41.07906403412867 1997 42.145285708995296 1998 41.35667253996222 1999 40.7068458139602 2000 57.17204778163922 2001 57.388780930139326 2002 58.22854195637201 2003 55.09626739725988 2004 55.43109711702887 2005 54.296439294312 2006 52.65011287410645 2007 52.101704294389876 2008 51.16028442617983 2009 51.651628373576266 2010 52.50044873931922 2011 51.23401871515887 2012 51.01116818861983 2013 51.07901946476815 2014 51.81255766304823 2015 52.44074219778793 2016 53.19711091221665 2017 53.522351776307545 2018 53.49124797142125 2019 54.36406952465854 2020 53.920419908031946 2021 51.742599229914696 2022 48.167465368414 2023 47.79880517306618