Year	% of GDP
1977	25.33696083943463
1978	22.87092013096005
1979	24.21367968277737
1980	24.614522520147712
1981	24.28829856711059
1982	22.25331330470293
1983	22.248132017210704
1984	21.550528617580028
1985	22.117897714553205
1986	20.00571023697626
1987	19.94209810070112
1988	20.377410804883286
1989	20.175410378185642
1990	20.786771344572706
1991	19.73708862915317
1992	20.17388971574753
1993	21.416811974592616
1994	21.958358080632976
1995	22.817507023082456
1996	23.717407186102143
1997	23.747988190477123
1998	22.701064119842407
1999	22.568912776249498
2000	24.18942737925216
2001	23.1976932355467
2002	24.1451673683176
2003	24.759386244448294
2004	26.212839903701006
2005	28.213187004154264
2006	30.087681672653414
2007	30.03542088995785
2008	30.20759652707196
2009	27.38187794401689
2010	28.635745171522974
2011	28.803056252787407
2012	28.17176434313726
2013	27.00184566497143
2014	26.172619752286657
2015	25.0665512452293
2016	24.988535891661734
2017	25.852306318870735
2018	26.58302555250156
2019	25.785551424389265
2020	24.553566273888162
2021	26.35003451721302
2022	27.251972316901963
2023	26.779306223067582