Year	% of GDP
1970	20.821231204468873
1971	22.781290628517283
1972	23.367225766635467
1973	22.60091803269231
1974	21.85927607509541
1975	23.011410039015004
1976	26.48140531782802
1977	30.71604851971023
1978	36.692456559285546
1979	33.86638863561963
1980	35.54213224733689
1981	34.41890525939209
1982	29.679403855576087
1983	27.249134286089937
1984	31.606395147949023
1985	35.490132983154524
1986	31.377238735419677
1987	30.972826522881746
1988	27.933769568548417
1989	30.034844669802446
1990	28.421909772164444
1991	24.387244654872113
1992	24.89963680427403
1993	26.548578501439362
1994	26.554012043058638
1995	26.287883073380442
1996	25.98692840044406
1997	26.91676569790229
1998	27.605748813405427
1999	31.615230161536463
2000	34.60434617001161
2001	30.400297647343717
2002	31.851832577987725
2003	33.48975885221283
2004	37.8637675568332
2005	39.511484354263175
2006	39.63330766831413
2007	39.37154080315306
2008	37.768993384928
2009	32.54196821797583
2010	34.158576171572655
2011	34.75932582897571
2012	35.31353689915317
2013	33.23677544458111
2014	31.873489119680638
2015	31.17124902557784
2016	29.954959885283884
2017	29.242255870729934
2018	29.87291645925026
2019	29.04935295238963
2020	27.51471657654085
2021	29.397271109052873
2022	31.7283799087485
2023	30.862783174774933