Year	constant 2015 US$
1991	2741.1887745036065
1992	2818.1308702836973
1993	2947.1693890749425
1994	3000.0352158494684
1995	3145.2568737465294
1996	3224.154943835959
1997	3371.4632205255493
1998	3493.6564078993074
1999	3756.7791196212297
2000	3764.9923632155414
2001	3816.7666510834097
2002	3871.71118480617
2003	3967.412257835258
2004	4104.496313483304
2005	4286.163571660934
2006	4534.560858160518
2007	4843.883329070598
2008	5119.3609331975895
2009	5526.296227193764
2010	5933.6732139052065
2011	6039.029196345864
2012	6295.791919592217
2013	6477.187049239452
2014	6804.247319272138
2015	7129.969786466129
2016	7427.42556129008
2017	7586.985096254324
2018	7830.832928412573
2019	7973.722160418842
2020	7991.638037648133
2021	8399.492097813909
2022	8898.114787744491