Year	constant 2015 US$
2009	2472225120.125486
2010	2508052535.744033
2011	2418936326.65216
2012	2394024448.0297666
2013	1377767642.9030836
2014	1330141834.3810658
2015	1414004962.12207
2016	1618401687.5162165
2017	1555499701.2922823
2018	1923084785.1362963
2019	1939917665.8071108
2020	1907507664.4056854
2021	1895476218.903057