Year % of GDP 1989 12.638526645795597 1990 13.570435868720903 1991 13.925656563138796 1992 14.99234132119692 1993 13.929145750112795 1994 14.524738201988685 1995 14.905155545570548 1996 15.231128844230962 1997 16.257021783084795 1998 16.961911391646527 1999 18.43777814145764 2000 19.480479925795375 2001 19.586974246524434 2002 20.535969723543058 2003 21.033497721454005 2004 21.73245155396594 2005 21.079238424506286 2006 21.16497021592639 2007 21.067822795928475 2008 22.08337035935668 2009 18.668946898483522 2010 19.482945283938175 2011 20.249400530008117 2012 20.88808847181106 2013 21.205524821541413 2014 21.286396022353436 2015 22.443303008228487 2016 21.908798200526483 2017 21.614750579193707 2018 24.2769953144139 2019 24.037491186180112 2020 23.6140753042968 2021 27.406489414942538 2022 28.94430352084083 2023 24.86656006164623