Year	current US$
2006	3630.3993030382094
2007	4786.635816519881
2008	5846.681264720753
2009	5151.226991913652
2010	4773.505889288186
2011	5472.78118947258
2012	4879.4437175487765
2013	5535.674049035515
2014	5426.731356321298
2015	4584.557261747519
2016	4679.413514971094
2017	5026.221826184093
2018	5868.807071558475
2019	5940.8043787314755
2020	6351.269735606655
2021	7431.640562767375