Year	current US$
2000	88.48213694089567
2001	89.31051375445574
2002	94.9239590072391
2003	105.95417954276822
2004	124.5038296332932
2005	149.2888260046234
2006	176.65809932000647
2007	217.79539012921708
2008	275.3425489934525
2009	286.77667317202435
2010	327.0571829289705
2011	387.52896423211416
2012	415.62574543333886
2013	454.94512863291715
2014	477.3470251054382
2015	449.51039282403747
2016	453.4004239532737
2017	508.35038876268067
2018	552.4184975874484
2019	578.3725993381961
2020	600.9629583155386
2021	688.2974463036667