Year	% of GDP
1970	20.136190653980176
1971	20.685806054521464
1972	25.918089407472777
1973	26.583486418863178
1974	25.91326878695121
1975	24.648458022363133
1976	24.496841294363485
1977	25.039608429691647
1978	25.79370677054063
1979	26.08330990137017
1980	25.782796538002366
1981	25.299375009422793
1982	24.46279323303725
1983	24.08062553283972
1984	24.29599146911038
1985	24.32171153892062
1986	24.526630270710196
1987	24.810089016875796
1988	25.45473747915064
1989	25.794441170257333
1990	25.471727950837515
1991	24.76757324724493
1992	24.14202543768387
1993	23.59230168641593
1994	23.58887105101367
1995	23.749924217398778
1996	23.817055986311804
1997	23.471004011186107
1998	23.37641560252069
1999	23.669028258559717
2000	23.904084567145347
2001	23.208531221218777
2002	22.296232387296353
2003	22.2040112449652
2004	22.3793244099047
2005	22.828081778177843
2006	23.131634350398798
2007	23.175478727320385
2008	22.818291006076524
2009	21.09072881658861
2010	20.64305791715409
2011	20.893894430213123
2012	21.161336814229987
2013	21.113633798468044
2014	21.342182410937813
2015	21.61049716631456
2016	21.686798000110407
2017	21.87267499679941
2018	21.962482762399222
2019	22.323538873994977
2020	22.445399584555453
2021	22.227316979048283
2022	22.276120052758273