Year	% of GDP
1978	1.324428451231531
1986	2.582847414520248
1987	3.0151654809305146
1988	2.8374002694750216
1989	2.7312345023107016
1990	3.0358350137056815
1991	2.3847238967028654
1992	3.4016474663850422
1993	3.1550079247099276
1994	3.201211777391256
1995	3.3596125630661335
1996	3.0353603728854206
1997	3.263275728176738
1998	3.491191635946498
1999	3.5088951173606078
2000	3.5717768237387855
2001	3.7720321535483055
2002	4.54786245143784
2003	4.497111896952085
2004	4.448626411928442
2005	3.357657816761793
2006	3.4120583178867476
2007	3.3964059453576882
2008	3.5513122996590663
2009	3.769315445093575
2010	3.834875753671283
2011	3.7897957252784145
2012	4.248919751928772
2013	4.215409515145874
2014	4.242021060998299
2015	4.606049129487007
2016	4.280053076099967
2017	4.096125579844473
2018	4.57754918068182
2019	4.811527876513981
2020	4.997899965371301
2021	4.7673682053115325
2022	4.324429127014676
2023	4.365567096927844