Year	% of GDP
1967	5.120116309444056
1968	6.611769799251752
1969	6.049621405518461
1970	6.884602352885477
1971	6.635730438589834
1972	7.723518092298896
1973	7.61387792993109
1974	7.738261423170326
1975	6.426765826217951
1976	5.390613632854032
1977	5.199632175843156
1978	4.82668267588703
1979	4.062189882088683
2005	7.010144032203469
2006	6.666210252846788
2007	6.271348509885216
2008	6.247367513035803
2009	7.456549552337479
2010	6.746891956969063
2011	6.050821294629641
2012	5.765085731916956
2013	5.45297344569884
2014	6.981283677671124
2015	6.426121850512863
2016	5.5081771168256655
2017	6.064296886251773
2018	6.28977968897592
2019	6.612924732846445
2020	6.786425649001759
2021	6.706366163006508
2022	6.555857365961061
2023	5.985334862763915