Year	current US$
2000	16.482507428828225
2001	16.87812672488708
2002	23.982493587557382
2003	21.7173486882472
2004	33.87615136033418
2005	42.35173715804461
2006	37.04317390884955
2007	31.856178589925303
2008	38.70971549982892
2009	41.595876420040696
2010	39.43294349406762
2011	39.63581240434548
2012	43.820505275538984
2013	45.593389267210604
2014	47.040407284908355
2015	41.47662237034565
2016	41.319868633381766
2017	39.59425521762249
2018	41.931787854761545
2019	46.09941094061768
2020	46.26116946621213
2021	61.94327840187998