Year	% of GDP
1970	21.41473563383313
1971	21.919818002317896
1972	22.58062246405704
1973	23.331808589452887
1974	22.694941831155358
1975	20.277475749360203
1976	22.038398387541022
1977	23.52626972667264
1978	24.831784670770823
1979	25.111129803492744
1980	23.310270824941107
1981	24.276864561444647
1982	22.07008277137104
1983	22.25298689777047
1984	25.09581775172608
1985	24.188340160208195
1986	23.740624517564843
1987	23.620231029933795
1988	22.827807757868996
1989	22.51379932572081
1990	21.529213448476174
1991	20.110605023051644
1992	20.077581998571546
1993	20.39362787431004
1994	21.279096765906854
1995	21.272649140698206
1996	21.701814985578068
1997	22.409715499247337
1998	22.958336243576362
1999	23.41913320621831
2000	23.67836665316548
2001	22.176722221439967
2002	21.722660257360435
2003	21.745628008676334
2004	22.652145385897057
2005	23.375718612120057
2006	23.537530048496684
2007	22.557576127721628
2008	21.037488366512836
2009	17.768753245858026
2010	18.6722135353972
2011	19.033538524892606
2012	19.950725884199368
2013	20.37926427502963
2014	20.901193527674533
2015	21.415189566078066
2016	20.88795624845486
2017	21.15576902465631
2018	21.569072925947435
2019	21.68711647177146
2020	21.408022811102594
2021	21.374194176484725
2022	21.88230798285961