Year	constant 2015 US$
1981	58693629811.36078
1982	53369980133.70033
1983	42740788093.68788
1984	41389044812.33171
1985	43734781021.84339
1986	42249171655.73094
1987	47512383044.102974
1988	53327359202.048195
1989	49009971373.61217
1990	51998168134.63124
1991	55363898434.71447
1992	60053961028.07451
1993	53723424220.054855
1994	51057768860.84269
1995	47694146756.07399
1996	49638469094.24102
1997	50020430766.3328
1998	49918757245.32939
1999	50891423335.36092
2000	51103357270.024956
2001	53694633541.570045
2002	58931379337.734375
2003	57599456082.844345
2004	61011848443.22024
2005	65664578167.67563
2006	69592774098.5781
2007	72553697258.04121
2008	75059764198.6487
2009	74884674940.85825
2010	77769603074.16583
2011	84834716268.0265
2012	90356297343.44112
2013	101187200919.40143
2014	110152160683.5032
2015	112030653166.04309
2016	112793154475.49474
2017	115308719240.6345
2018	120168275419.90602
2019	123357111853.01845
2020	119022349669.63634
2021	127406063612.80243
2022	134945120560.88026
2023	134319239238.65193