Year	% of GDP
1971	4.48395943257445
1972	4.487544442394337
1973	4.756565402637788
1974	5.1351090755290425
1975	5.983257145513047
1976	6.189925125930117
1977	6.392183085050523
1978	6.546465565767676
1979	6.69213884678966
1980	7.173815147641929
1981	7.230826713422728
1982	7.186150122392021
1983	6.777558592437499
1984	6.689382118590509
1985	6.6060616272350705
1986	6.778440842641957
1987	7.030537928585004
1988	7.048491448225072
1989	7.177784243827984
1990	7.674616024987719
1991	7.657931200616556
1992	7.973372956834446
1993	8.045607444701771
1994	8.086944393354498
1995	8.324661486062455
1996	7.58656718469173
1997	7.880092483864646
1998	8.32100875023825
1999	8.694419613618571
2000	9.05734494014773
2001	9.16811310303426
2002	9.538817293386442
2003	9.697556516287241
2004	10.469282753722322
2005	10.953815413850343
2006	11.549609384481219
2007	12.388403493213163
2008	13.046202581024742
2009	12.382877424518488
2010	12.715898259855999
2011	13.155243611528382
2012	13.426367134466142
2013	13.982383039597291
2014	14.589652815507069
2015	14.658142307554373
2016	14.457744016510999
2017	14.979324645946466
2018	15.363831149826494
2019	15.489932413706464
2020	13.313998200240212
2021	14.090957697081778
2022	15.696865084930334
2023	16.014680987175105