Year	current US$
2000	62.604662091502696
2001	62.31058514357979
2002	60.72778280757876
2003	67.97319746924391
2004	78.08286713810614
2005	91.28345188322658
2006	104.5832781266385
2007	124.70722433175236
2008	147.731178716447
2009	155.11516381912898
2010	179.58834028280359
2011	208.6360859249674
2012	221.86646590158867
2013	237.74885606883603
2014	245.93369385793454
2015	240.6714456594259
2016	238.9978413093552
2017	258.1202575734638
2018	271.4941612377371
2019	278.99569802029396
2020	283.2695467875957
2021	320.8149078375961