Year	constant 2021 US$
2001	4454726
2002	3821567
2003	3737912
2004	15709852
2005	25110192
2006	37613288
2007	60401071
2008	51690413
2009	42619090
2010	44279064
2011	56286648
2012	59815557
2013	55306937
2014	49560542
2015	62600776
2016	73437047
2017	71622926
2018	72426768
2019	77497484
2020	79600851
2021	86390000
2022	236214659