Year	% of GDP
1967	18.833171002780162
1968	20.887648562974086
1969	21.25589361954757
1970	19.532048349314167
1971	19.31836291836778
1972	23.188656053863305
1973	26.513661580788085
1974	31.455903905662147
1975	23.244468616628087
1976	25.08076234624309
1977	25.03361774127904
1978	27.65369020118077
1979	25.71581424503695
1980	43.80118341747086
1981	43.03580879695621
1982	45.36402444647105
1983	46.756582874790205
1984	45.29916064476129
1985	43.26561520748054
1986	43.29179961871776
1987	41.471756203301126
1988	40.84752362017246
1989	40.632049258588374
1990	41.070588266444744
1991	39.12032420813249
1992	41.69433516921511
1993	39.400140894446054
1994	40.71862523678733
1995	38.48869404022167
1996	37.83411544300905
1997	36.63988458459958
1998	37.53717133407093
1999	37.33446591382445
2000	37.262642932904946
2001	35.87225228953505
2002	35.28729841914189
2003	37.264051843831375
2004	36.54710866609207
2005	34.79100986474118
2006	34.591252320989
2007	35.950102985147645
2008	36.736038777242825
2009	34.21092224580892
2010	35.45321660922919
2011	36.72795683947348
2012	34.21871556397937
2013	38.27280844453686
2014	37.3111410413359
2015	37.2660625296056
2016	35.64273696254112
2017	34.8869589972434
2018	33.94837767088585
2019	33.49700399896431
2020	34.42646453822006
2021	35.4011532022306
2022	36.167452847193715
2023	36.123543466433816