Year % of GDP 1983 15.277026757295095 1984 16.074072170279315 1985 15.945994236357993 1986 19.460969932355688 1987 20.760255770059498 1988 20.665466823859617 1989 20.581227999891325 1990 21.217674334944533 1991 21.076638376707095 1992 22.078263675218174 1993 20.233878133603355 1994 19.99703376387949 1995 18.216390738547055 1996 17.87556389794533 1997 16.906538635622002 1998 17.35403468341427 1999 23.106163266868236 2000 23.570605388491114 2001 22.975815950753226 2002 21.44647516262794 2003 22.41400182708181 2004 22.692821013330757 2005 22.44223797053361 2006 22.24956154612979 2007 22.516088414874833 2008 22.87426434867014 2009 22.937165944362402 2010 22.471844008544227 2011 22.211628301180344 2012 23.13544319733273 2013 23.98796334991493 2014 24.165728827467976 2015 25.209851936737742 2016 27.11531622743797 2017 28.31381352307727 2018 28.767578410391824 2019 28.15662077993151 2020 27.746621912753923 2021 28.682689152295897 2022 28.85129796495009 2023 28.57227966152144