Year	% of GDP
1970	1.54649996757507
1971	1.30245995521545
1973	1.11261999607086
1974	1.33608996868134
1975	1.46085000038147
1976	1.44825005531311
1977	1.4937299489975
1978	1.68570005893707
1981	1.69280004501343
1982	1.68684005737305
1983	1.68868005275726
1984	1.81002998352051
1986	1.83336997032166
1987	1.83421003818512
1988	1.86893999576569
1989	2.01546001434326
1990	2.04608011245728
1991	1.93432998657227
1998	2.89256000518799
1999	3.02772998809814
2000	3.23019003868103
2001	3.36457991600037
2002	3.42430996894836
2003	3.42933988571167
2004	3.66719007492065
2005	3.96395993232727
2006	3.64772200584412
2007	3.58999991416931
2008	3.76999998092651
2009	4.13000011444092
2010	4.1399998664856
2011	4.51999998092651
2012	4.57999992370605
2013	4.5
2014	4.32000017166138
2015	3.66139006614685
2016	4.01999998092651
2017	3.47708988189697
2018	3.59734010696411
2019	3.58606004714966
2020	4.51000022888184
2021	4.09000015258789