Year % of GDP 1990 15.348638852755506 1991 15.48169791867421 1992 19.000427255730333 1993 17.76173058011864 1994 17.52028940602383 1995 14.620510236285316 1996 12.654021986350447 1997 17.268240367555805 1998 17.47221091244643 1999 36.27137114354133 2000 37.67565039917856 2001 31.413581532397654 2002 29.26914269809687 2003 26.567505875276336 2004 27.294270559193567 2005 29.142109237772747 2006 28.598737960154146 2007 29.871832603341 2008 33.45628829727414 2009 27.062655405674384 2010 28.538879866961047 2011 31.135809878831903 2012 29.937164166924585 2013 26.69799609377399 2014 25.011186092874453 2015 19.8713266373073 2016 18.788016360193485 2017 22.507189849079744 2018 25.479089978362847 2019 23.250586458115855 2020 19.305811353060836 2021 24.350269361481843 2022 26.050704798872083