Year	current US$
1990	12813694916.4268
1991	10484619698.0976
1992	10535309191.9135
1993	9663006048.25823
1994	10587376510.0265
1995	10812907478.0318
1996	11064884030.345
1997	11495796338.5313
1998	11005995996.7468
1999	11010685229.0186
2000	10762660586.1929
2001	10612936669.7583
2002	10783866895.6227
2003	11779165000.1743
2004	12659363717.3419
2005	13872579181.8314
2006	14994081770.1358
2007	18695593421.7251
2008	18604495823.7851
2009	20027009104.3301
2010	24190828098.3263
2011	26495255045.5618
2012	26626084748.894
2013	26233818666.7407
2014	27085459052.7427
2015	26770653730.7772
2016	27307395803.4496
2017	30248568761.1619
2018	30317568107.6846
2019	31945681467.4647
2020	33040076162.5398
2021	36773699404.9093