Year	% of GDP
1980	11.459370932233304
1981	12.720816924718664
1982	14.967809335482624
1983	15.937293299915936
1984	18.09831955737661
1985	20.034669224410614
1986	23.938674736664243
1987	21.438378920903066
1988	21.42905450266245
1989	21.59457446277291
1990	21.295348458570057
1991	20.571642365949653
1992	20.982263341288082
1993	19.588102020412645
1994	18.484939878363214
1995	18.333810505573318
1996	17.797791103611395
1997	17.133927523155023
1998	18.26178518708987
1999	18.306397517169227
2000	16.208824263055185
2001	17.26048502985141
2002	17.669024939287418
2003	17.315981969823227
2004	15.438490755309983
2005	14.056733241842432
2006	12.711220085688128
2007	12.099778715571178
2008	11.293018733255407
2009	13.978227825205774
2010	12.927549003484623
2011	13.835951940850277
2012	15.44231231631225
2013	15.552226265321
2014	16.12526266988907
2015	17.642515115368973
2016	17.10309622671851
2017	16.64998659838475
2018	16.286074545465546
2019	15.689935952485873
2020	17.13692906182909
2021	15.808959732043373