Year	current US$
2000	385.8288802
2001	368.25933092
2002	121.46786443
2003	142.78991158
2004	160.69074498
2005	200.94817796
2006	238.62477629
2007	309.17850834
2008	409.32963561
2009	468.75522245
2010	577.81536102
2011	725.40137579
2012	850.24868392
2013	900.03306052
2014	837.82365774
2015	1017.41998184
2016	822.84693813
2017	963.61212261
2018	712.62912612
2019	615.51572509
2020	572.71556387
2021	660.36878437