Year	current US$
2002	4205000000
2003	5061000000
2004	7206000000
2005	6924000000
2006	8176000000
2007	10870000000
2008	13400000000
2009	14879000000
2010	22276000000
2011	30595000000
2012	36085000000
2013	43223000000
2014	42847000000
2015	31101000000
2016	30632000000
2017	36080000000
2018	40876000000
2019	40591000000
2020	9360000000