Year	% of GDP
1970	1.90820091270164
1971	1.84546489068877
1972	16.7131224688609
1973	28.2123617458145
1974	30.571485208406
1975	20.5404355739123
1976	19.7305989878801
1977	19.0498460069848
1978	18.3631305454108
1979	22.3521519220003
1980	25.1506139115283
1981	20.1296054759951
1982	19.9372287742569
1983	20.8523675802419
1984	15.5144396694103
1985	21.0178195683985
1986	20.3957401418907
1987	24.2590852878059
1988	25.4597675502336
1989	24.361898734598
1990	23.014711608676
1991	18.2529417838879
1992	21.1079821473631
1993	22.42832098677
1994	21.1315448258749
1995	26.6836251789136
1996	20.9580370465991
1997	12.6784825145613
1998	13.9562495211202
1999	17.3650563766783
2000	25.7002086888519
2001	17.505282726103
2002	19.8483010320863
2003	22.084810442314
2004	28.790794029329
2005	31.2020381442888
2006	27.4026305651904
2007	24.2068320642901
2008	25.3611419818964
2009	18.9071661714619
2010	27.8968249359842
2011	26.2680889498874
2012	15.8152886420978
2013	11.6658602971436
2014	14.02772535223
2015	12.7384528214768
2016	14.3368397378808
2017	16.0436340949199
2018	16.921880825492
2019	13.8152037166577
2020	11.9417254747487
2021	27.3866812481734