Year	% of GDP
1977	1.386449053272116
1978	1.9541692751981534
1979	2.1004822602914963
1980	2.2140021283898297
1981	1.4366152855285916
1982	1.8300286509576802
1983	2.450953471084535
1984	2.327100462308568
1985	2.2487029424376446
1986	2.2990080079267647
1987	2.378520636195524
1988	2.2130274565594052
1989	2.3525713731765623
1990	2.407277066441031
1991	1.932633118780826
1992	2.409806666779149
1993	2.3967116936796433
1994	2.4638403115145966
1995	1.9936881648459308
1996	1.6493989410038719
1997	1.8671999245187565
1998	1.780916831111913
1999	2.8004676566418025
2000	2.633768447154602
2001	2.675392584233892
2002	3.3580514497474927
2003	3.438720009468385
2004	3.4735890819823068
2005	4.7748507280810815
2006	4.730147467759579
2007	4.619574945040867
2008	4.724977908486375
2009	4.913912004309709
2010	4.849628368719459
2011	5.166029651134731
2012	5.391215262395244
2013	5.139894114611654
2014	5.102189935632387
2015	5.381181769159529
2016	5.234471130223987
2017	5.430211016361484
2018	5.612325950607996
2019	5.7531447000782965
2020	5.858556968237093
2021	5.969134321784996
2022	6.035851320306359
2023	6.131704124856917