Year % of GDP 1990 10.387539633905362 1991 11.162091035774552 1992 12.280641147650911 1993 15.099555625285449 1994 14.863851771286512 1995 14.026297151416445 1996 13.040835054965145 1997 13.600299120054359 1998 13.756126687478517 1999 14.01113842615943 2000 14.177610253207426 2001 13.77750196085364 2002 14.056113634909465 2003 17.199701951355312 2004 16.734777769666508 2005 16.621657516102665 2006 17.201755160305186 2007 17.930072998700407 2008 18.971734152218062 2009 20.13602102797831 2010 21.241316426753677 2011 20.19640807428102 2012 21.18223460486703 2013 21.565282964359568 2014 22.332294370501444 2015 22.149080304016415 2016 21.25670130713878 2017 19.337123974458244 2018 17.702448387611078 2019 18.736299582670675 2020 17.478702194570197 2021 18.026908618474685 2022 17.974289398734527