Year % of GDP 1990 23.333333333333332 1991 19.270833333333336 1992 16.353887399463808 1993 3.059724704059914 1994 2.6465698769810486 1995 4.032902674467823 1996 18.565462065400027 1997 18.458569891764913 1998 25.55341391051552 1999 26.207581985287632 2000 25.447382965696413 2001 27.23491459394666 2002 24.48476931330472 2003 27.352553099566794 2004 28.16180287654082 2005 28.78692700221153 2006 26.21338805937679 2007 26.37903235297579 2008 22.038385522335634 2009 15.713332592016013 2010 18.639976522642105 2011 19.830910379708037 2012 21.584130910133705 2013 18.437891070080305 2014 21.442521593846543 2015 23.92013517425032 2016 26.002440839329193 2017 25.13547169811321 2018 24.792753338916558 2019 23.96279572054861 2020 22.232809455903915 2021 20.75809235228246 2022 19.750157287949495 2023 21.465902474889713