Year	current US$
1988	31677601656.829964
1989	32849901181.49163
1990	35830498628.32327
1991	39871942120.34738
1992	35478665856.117256
1993	34784535521.47562
1994	34905513018.441025
1995	41331160145.396904
1996	44950620526.289604
1997	46031897652.54376
1998	49646847271.89953
1999	50086837923.988594
2000	51379760165.864624
2001	50628203370.49823
2002	56781862724.16358
2003	65699302888.48975
2004	78485971473.38655
2005	94740816342.27867
2006	109739385177.51588
2007	138147728504.78647
2008	168803150900.0771
2009	151680852408.3435
2010	175792010120.0837
2011	208261306843.96707
2012	224552533040.15912
2013	241982194261.57785
2014	249696623703.07092
2015	232110751653.26987
2016	220656598356.3459
2017	231597034788.8848
2018	253579587612.21222
2019	254225566979.54846
2020	231157377893.00034
2021	278913588917.7908
2022	331322865501.9664
2023	333916625270.9031