Year	current US$
2000	2783573969
2001	2536769150
2002	2749191811
2003	3806348034
2004	3516614771
2005	4437711303
2006	4512885125
2007	5080071102
2008	4945297261
2009	3457379295
2010	4684582888
2011	5925177838
2012	6724320423
2013	7946259515
2014	8552274071
2015	6340344176
2016	7333077319
2017	5911828499
2018	6374895745
2019	5051675890
2020	3733633233