Year	current US$
1991	100837451.511059
1992	74356696.6397658
1993	71706402.3749994
1994	72141554.8012558
1995	74727735.076161
1996	88201975.4046872
1997	97584404.29933
1998	104192443.222921
1999	111527447.900809
2000	107504998.456387
2001	99137541.8913931
2002	104277900.00734
2003	110553247.260176
2004	126521233.277349
2005	139258272.085676
2006	145310118.46521
2007	155806573.084173
2008	186205343.048596
2009	173269676.877092
2010	156898566.66548
2011	193604326.012525
2012	212832732.351677
2013	210912137.554526
2014	211877659.850221
2015	183479468.308063
2016	134098035.546378
2017	144692759.445048
2018	160107841.529357
2019	166110461.584071
2020	154367993.109793
2021	170120293.985606