Year % of GDP 1990 18.106954887218045 1991 17.37737603305785 1992 14.981637917136869 1993 11.96867899667379 1994 9.92077922077922 1995 15.388170107284463 1996 8.714175642400306 1997 0.016252434031983565 1998 -3.959061675662761 1999 -2.8844150704808342 2000 7.612831093200775 2001 4.273890321839353 2002 1.8988247396367095 2003 2.1727318064415284 2004 1.584124564615045 2005 3.619422461557415 2006 4.439433759407478 2007 5.852680020059589 2008 2.811829641591747 2009 4.1768164738002325 2010 6.166761186930591 2011 7.969650097159328 2012 7.460847691144047 2013 10.743368580030326 2014 13.083006874122255 2015 14.181310089917954 2016 17.651795996940123 2017 18.427098264698934 2018 19.863878053135377 2019 20.499997834507273 2020 17.219101123595507 2021 16.387253322731667 2022 15.114656081559778 2023 10.34354772897333