Year	current US$
1990	3493098581.36838
1991	5821714550.48446
1992	5881860539.03024
1993	3549794413.27486
1994	5208950438.85345
1995	4895222205.14766
1996	3964012035.63106
1997	3972702560.37672
1998	4640684611.3521
1999	4108629958.23679
2000	6990452976.67824
2001	7780724568.33471
2002	8076025891.73959
2003	9898831788.10206
2004	12386508375.4077
2005	10747625826.1824
2006	10314000635.7154
2007	11154757621.5813
2008	6147527909.50343
2009	11917098518.9748
2010	13985259140.5822
2011	17556017634.5766
2012	15415308734.5073
2013	19145036895.5097
2014	22392039362.8219
2015	28119532418.1521
2016	28774511249.7074
2017	25477528643.826
2018	22961641745.8459
2019	18287058911.2033
2020	26359330242.4988
2021	29055019317.1859