Year	current US$
1984	482.73738911084837
1985	632.5272839016517
1986	461.7105067738547
1987	274.5849249819837
1988	146.98576729884743
1989	170.27336886753147
1990	200.61914814969313
1991	231.69615521206333
1992	247.26611146838658
1993	283.38629830024456
1994	321.05291134825376
1995	357.90170306553927
1996	371.47174800092847
1997	339.19016951842093
1998	243.98644361762067
1999	272.36243261298983
2000	318.77092281224174
2001	320.4190110718693
2002	313.6184405306751
2003	355.65148355382445
2004	410.2513189828255
2005	467.3795927089842
2006	581.0100104342937
2007	699.0414621108595
2008	887.6395924550993
2009	936.790193410368
2010	1127.8348220384235
2011	1363.7248564752122
2012	1566.0093475563588
2013	1815.4402378619227
2014	1984.5082827118642
2015	2125.458900599599
2016	2309.0499981809485
2017	2439.4624116718387
2018	2553.3604179639433
2019	2598.505794751577
2020	2593.355718173363
2021	2535.6234343971664
2022	2054.4307808649573
2023	2075.4014140644076