Year % of GDP 1996 13.10324623080421 1997 15.946757302323977 1998 14.221671153066115 1999 14.192466022014983 2000 14.922852912137433 2001 16.397583524459282 2002 17.234811330631544 2003 20.047673785175444 2004 21.268567548429413 2005 20.98034183647282 2006 21.134488379518377 2007 25.462435954643304 2008 30.235913640462762 2009 29.306841204765522 2010 34.388435753487876 2011 37.4242739306115 2012 36.80275323999073 2013 36.38810022854284 2014 35.08737530239489 2015 29.150249343806646 2016 27.775285887188357 2017 29.03705734079494 2018 29.436514348400884 2019 29.778266315476674 2020 21.8273817460377 2021 19.30812669949501 2022 17.06650192709553