Year	% of GDP
1971	0.0008163815761028666
1972	0.0010456806335327423
1973	0.001399728690493412
1974	0.002853096298565405
1975	0.007475408365862793
1976	0.004752454296090137
1977	0.0042017560998112964
1978	0.0031938650260467365
1979	0.0028892633220354413
1980	0.02183218604818268
1981	0.026796842796293956
1982	0.033453299702438696
1983	0.03647464686547928
1984	0.029088832451868062
1985	0.026320365885218713
1986	0.019750237504134096
1987	0.013257900090406238
1988	0.009981003191460143
1989	0.014641561534053075
1990	0.011304634516247648
1991	0.014556460334143696
1992	0.012377670974068578
1993	0.009520214209900024
1994	0.006858705418981055
1995	0.008950653690305734
1996	0.009138491361168394
1997	0.008408570997466199
1998	0.008916857319471639
1999	0.0058148325871478215
2000	0.004827535810584802
2001	0.006175208300170184
2002	0.006574963023311793
2003	0.00526140105888075
2004	0.005860845701631305
2005	0.010066191922241296
2006	0.009706797096928722
2007	0.0059100691425347995
2008	0.015942762429779576
2009	0.010618396559560008
2010	0.011954200515907133
2011	0.013293698263155017
2012	0.005826460005594553
2013	0.004119751808401828
2014	0.003390986191161912
2015	0.002484230748420853
2016	0.002355110150646333
2017	0.003322013396642647
2018	0.0029008658164792764
2019	0.0021521724974880377
2020	0.001660223879306524
2021	0.002207584652797426