Year	current US$
1991	467275569.71708
1992	483713908.245682
1993	477364938.843394
1994	489791081.375484
1995	497257469.445921
1996	488897807.353911
1997	494662232.10101
1998	501897213.020183
1999	527732216.884817
2000	546183372.109568
2001	563079134.320484
2002	582651952.837033
2003	616260913.563528
2004	656664020.833993
2005	692900820.378613
2006	743786020.143199
2007	791056097.102196
2008	915515225.060053
2009	905676339.120546
2010	905792589.550267
2011	1015804640.92021
2012	1117354985.44757
2013	1586766759.01953
2014	1866674017.6781
2015	2085118765.08581
2016	2156902295.4745
2017	2218600288.84053
2018	2451825114.43257
2019	2638372564.74996
2020	2742439520.41707
2021	3080405148.08069