Year	current US$
2000	22.3067379
2001	22.58142662
2002	25.20564651
2003	28.68665123
2004	30.64061928
2005	33.17791367
2006	34.37842178
2007	39.64344025
2008	48.52267838
2009	44.13393021
2010	43.3949852
2011	47.4840889
2012	49.02023697
2013	55.34606934
2014	59.37288666
2015	57.40904617
2016	48.89683914
2017	54.19649506
2018	55.62037659
2019	60.7460022
2020	63.2988472
2021	89.28845215