Year	current US$
2000	85.08785226419569
2001	81.75597084793488
2002	89.6364516092945
2003	95.36908343874255
2004	118.04718963729604
2005	140.01822338061584
2006	138.5665177921852
2007	145.78276289229103
2008	148.05268120946195
2009	143.3872328593335
2010	148.34888469249728
2011	163.1084395924117
2012	173.33720057485078
2013	179.15178544525935
2014	187.64432164236257
2015	181.45890949253564
2016	187.95207352761105
2017	193.43577567750398
2018	219.6093833446354
2019	227.44432425069726
2020	223.0199455069672
2021	236.26190900752476