Year	current US$
2000	5673365714.285714
2001	6447118873.626373
2002	7118693763.736263
2003	7633155824.175824
2004	8129214807.692307
2005	8816171373.626373
2006	9233673956.043955
2007	9858829148.351648
2008	11718913021.978022
2009	13328220686.813187
2010	15675024697.802197
2011	15876100027.472527
2012	19662368598.901096
2013	20280136923.076923
2014	20915613269.23077
2015	14419966675.824175
2016	12860941758.241758
2017	12963920714.285713
2018	15102077252.747252
2019	14698027774.725275
2020	11424759010.98901
2021	15747952857.142857
2022	21886528186.813187