Year	current US$
2000	0.76758833
2001	0.61720009
2002	1.08302597
2003	0.90245663
2004	1.39828064
2005	2.02846094
2006	2.04922539
2007	2.5111732
2008	3.29920134
2009	2.89213937
2010	3.96235175
2011	7.01578963
2012	4.42990879
2013	4.13776092
2014	6.55419263
2015	4.98698247
2016	5.03691023
2017	4.7692846
2018	8.24541248
2019	7.33070097
2020	7.01362837
2021	10.80995866