Year	constant 2015 US$
1990	42240194967.91598
1991	31342224667.64427
1992	26139415372.528282
1993	18689681991.906757
1994	16559058243.494362
1995	10283175169.215778
1996	7825496303.910948
1997	8083737682.241498
1998	7501708568.596117
1999	7539217111.862916
2000	8753031066.70428
2001	10967547926.70761
2002	12064302719.282047
2003	13029446936.439322
2004	15961072497.5957
2005	20446133868.824818
2006	26518635627.865788
2007	31106359591.129215
2008	31417423187.83035
2009	31166083801.433834
2010	32350394986.289017
2011	33450308415.451042
2012	36761888948.6096
2013	38783792841.3466
2014	40490279726.65867
2015	42190871475.13981
2016	43456597619.31694
2017	45412144512.349945
2018	47864400315.46588
2019	54469687559.08686
2020	54360748183.920525
2021	55774127636.348
2022	57781996232.023254