Year	% of GDP
1987	22.80130293159609
1988	21.994134897360702
1989	19.733333333333334
1990	25
1991	21.83783783783784
1992	21.367867260218535
1993	20.28498328571162
1994	18.90392039403621
1995	19.538435810245833
1996	18.5180753270397
1997	17.295678443053276
1998	17.854447155470517
1999	19.120507139340226
2000	20.04140292574555
2001	17.475755750607373
2002	18.619206334884854
2003	16.83100556327902
2004	18.17262617023509
2005	17.509851416066727
2006	17.98733041535113
2007	17.103025630436576
2008	17.52070168980685
2009	18.43155028577761
2010	18.1270712390519
2011	18.22744293401392
2012	20.105851974079407
2013	18.446991062070143
2014	17.473333765916134
2015	17.75537330303603
2016	17.43415085973793
2017	17.130172032385275
2018	17.169700111839852
2019	15.700980649991008
2020	18.37228301395398
2021	16.632941787507587
2022	16.785668030964846