Year	current US$
2000	22.49458838769542
2001	23.61541701951063
2002	23.66673469469794
2003	26.521543139152797
2004	29.722282467700364
2005	33.39963825357048
2006	37.621438648176515
2007	44.05711366162606
2008	49.44851480500806
2009	49.89150192303299
2010	56.28435216957262
2011	61.51556289127106
2012	65.00884708145774
2013	71.10161294220016
2014	73.37001009744996
2015	73.59733472349481
2016	73.27225536766703
2017	71.26191915484054
2018	72.92900466745603
2019	76.67506869995216
2020	78.84273533484571
2021	90.24569444532023