Year	% of GDP
1970	15.185606866284724
1971	14.777534646243618
1972	14.748475609756099
1973	14.49842408433866
1974	16.320474777448073
1975	17.430628731998596
1976	16.284732168433113
1977	17.4646806878476
1978	18.736604624929498
1979	18.45767298028605
1980	19.55077638462177
1981	19.189852700491
1982	19.133160528060763
1983	18.27840709400092
1984	17.669019983247576
1985	17.863582664925698
1986	17.724707952996393
1987	17.544612742993806
1988	17.59271140767355
1989	17.80170322858837
1990	18.446805995244787
1991	18.694959653533772
1992	18.8549179804685
1993	17.73219036358262
1994	16.793598233995585
1995	16.80140487967081
1996	16.632872078416632
1997	16.834422554023757
1998	17.547226330668565
1999	17.27649277128651
2000	17.090429659793557
2001	16.89741438249736
2002	16.759751740259357
2003	16.80737982865289
2004	17.0698568184318
2005	17.947427533341106
2006	18.361200902304596
2007	18.42848189079299
2008	19.787123955946484
2009	19.77952415507419
2010	19.70129142036569
2011	19.58362671924142
2012	19.383523223629158
2013	18.74379824482274
2014	18.7730480966135
2015	18.494344099578303
2016	18.142520738363118
2017	17.919745187875787
2018	18.233482377610045
2019	18.866207536949624
2020	20.4690968072392
2021	21.098320700944225
2022	21.10940937031022