Year	% of GDP
1970	28.000295303582305
1971	27.12603538401836
1972	26.86673806600085
1973	27.155872407795705
1974	26.57800143640192
1975	23.863578306449234
1976	24.051453842195382
1977	23.69520791138853
1978	23.995878138475923
1979	23.69352874881133
1980	22.667302726739607
1981	21.30788053828158
1982	21.2164821852625
1983	21.29966403201374
1984	21.850596205156204
1985	21.856267307886636
1986	22.787078209432853
1987	22.23579837954505
1988	23.19424107098915
1989	23.66485142357022
1990	24.088775402140275
1991	23.740756969507498
1992	22.950290097717442
1993	22.534526698104933
1994	23.14004982194876
1995	23.768262283045658
1996	23.373495915824922
1997	23.937947301413065
1998	24.444765843927087
1999	24.24170433839152
2000	24.338980037733144
2001	24.43821661690177
2002	24.467413116240397
2003	23.951239356739986
2004	24.347172973690615
2005	24.028538738091108
2006	24.68074258317044
2007	25.625105163668938
2008	24.765513149236504
2009	22.052166889888802
2010	22.540262370748536
2011	23.108735316186817
2012	22.88998087626721
2013	23.11414265938119
2014	23.799450846591206
2015	24.822012896111794
2016	25.076488386230096
2017	25.631089632272168
2018	25.884123976353706
2019	26.251021624250132
2020	25.926845651642573
2021	27.1198268216173
2022	26.187520097133888
2023	26.45179535016234