Year % of GDP 1990 20.259208731241472 1991 11.452095808383234 1992 21.816974751561172 1993 20.953821656050955 1994 26.25871363757673 1995 15.643452994657418 1996 29.107809412281345 1997 36.99141943450591 1998 35.51415450793466 1999 28.510503033032236 2000 23.13643203832051 2001 22.881706674693355 2002 34.08 2003 52.88183026656406 2004 57.71025298351737 2005 41.30884408065482 2006 29.70095272641922 2007 21.399481673454275 2008 18.578774802427674 2009 18.8194317655155 2010 18.166725538678914 2011 20.177604546676395 2012 22.455186624214292 2013 25.793888144099547 2014 27.430393753357247 2015 27.825303420375135 2016 25.034588218160636 2017 23.817207817133887 2018 20.694076811666584 2019 21.129551798496145 2020 22.666479282317948 2021 16.22712524891849 2022 12.011626249228387 2023 14.850474165789334