Year % of GDP 1990 6.78456483012336 1991 6.665734404630555 1992 6.639917202296536 1993 6.711616707748271 1994 6.7527885025690555 1995 6.699428476772947 1996 6.647549418427072 1997 5.929156972264184 1998 5.84268988498867 1999 5.3584948362604194 2000 4.949331546236288 2001 4.813986687150808 2002 4.7837416660287815 2003 4.658673688791059 2004 4.369793203304049 2005 4.055933512030504 2006 4.311160522814372 2007 4.118737833202203 2008 3.9830264708168084 2009 4.109140829054494 2010 4.229706850224643 2011 4.161250623737304 2012 4.211469381849957 2013 4.170033959070926 2014 4.068761684083268 2015 4.19178867259263 2016 3.982905021804733 2017 3.85350606729239 2018 3.6427192295006248 2019 3.6271224937942903 2020 3.961728110696145 2021 3.7223199185770723 2022 3.6579930532897946