Year	current US$
1990	634.5673276100332
1991	572.1617627309502
1992	356.08221259047457
1993	347.4664632570326
1994	389.82528646495257
1995	441.89400183385015
1996	484.0916409774047
1997	501.15651523636427
1998	584.3842672585266
1999	575.62847915563
2000	603.2980252471151
2001	676.1500113077658
2002	765.31617768154
2003	910.1712617451836
2004	1166.6382039002456
2005	1608.1634075824245
2006	2109.5263835730952
2007	3064.279962638588
2008	3908.9490601143148
2009	2917.3662418517574
2010	3143.0294799682983
2011	3462.681778404311
2012	3643.7154010856507
2013	3833.15707396348
2014	4017.229914494734
2015	3666.1418221090494
2016	3679.952347403763
2017	4041.9950710505846
2018	4391.923269914735
2019	4828.504886265984
2020	4505.867741756952
2021	4972.78320361917
2022	7018.0515043479845
2023	8715.765336221775