Year % of GDP 1987 28.000000000000004 1988 25.925925925925924 1989 28.57142857142857 1990 33.33333333333333 1991 32.20338983050847 1992 10.875 1993 18.163672654690618 1994 32.68348623853211 1995 16.211656441717793 1996 12.63225806451613 1997 20.234023402340235 1998 25.158985351911394 1999 24.841685365245574 2000 22.53877082136703 2001 23.098044654000834 2002 20.932802829354554 2003 19.119602727043176 2004 18.355459225142237 2005 18.531997088628856 2006 17.197874061755584 2007 18.854814814814816 2008 10.721649484536082 2009 10.515352970786829 2010 11.340542556166683 2011 8.88435455800276 2012 8.501466802370832 2013 8.47439420658294 2014 8.295443552287898 2015 9.306538759287783 2016 10.52743832597379 2017 11.117807476156754 2018 11.041568836338914 2019 10.811357104506838 2020 11.492052406103651 2021 11.807959960234479 2022 11.608388074785244