Year % of GDP 1989 18.349245607309534 1990 17.992786045621838 1991 12.528835709228003 1992 10.850705163931801 1993 9.174398857338694 1994 7.870608735045967 1995 10.806454876033113 1996 12.846320000714284 1997 14.5319587628866 1998 13.763432636047268 1999 14.063989627426304 2000 14.177555726364336 2001 15.604915999548991 2002 16.098642283180936 2003 16.73658133773741 2004 35.054904551184215 2005 36.623538708259645 2006 35.5896575058264 2007 37.141517004262454 2008 38.54565444028783 2009 33.19570169865377 2010 35.02312286640705 2011 36.3630972315613 2012 28.809212878115094 2013 26.646754746661927 2014 23.75616449846835 2015 23.139667726802415 2016 21.72615588741385 2017 21.926933186023817 2018 20.754521158756575 2019 20.697758956757735 2020 16.37258686764814 2021 26.025627692713734 2022 34.8287792460469 2023 46.077450720457996