Year	current US$
1991	0.041258098540966404
1992	1.0064954624174343
1993	3.1848749585357043
1994	19.619431621740528
1995	15.555280963913024
1996	12.4127271171392
1997	23.482282085745418
1998	15.210413321161633
1999	21.421189439729417
2000	17.47011910274482
2001	28.468044637305088
2002	42.9285540854501
2003	36.680389936884055
2004	21.167760408241136
2005	25.071944076274484
2006	24.026024491990263
2007	18.799017319545875
2008	21.047766500244425
2009	19.91004372963247
2010	17.28233465787857
2011	31.37113447952084
2012	30.85162139577705
2013	-7.521662805771801
2014	22.730803330854837
2015	7.210855314477404
2016	8.140144563676344
2017	12.535983873739514
2018	8.794971048019647
2019	11.880151062962907
2020	12.174628368511385
2021	0.9627383027675608
2022	4.651068135433873