Year	current US$
2000	77.74626923
2001	76.11361694
2002	75.27822876
2003	132.39044189
2004	177.11592102
2005	218.70697021
2006	238.984375
2007	253.80125427
2008	267.72537231
2009	282.30490112
2010	346.70117188
2011	369.37054443
2012	343.8296814
2013	306.57077026
2014	285.05142212
2015	252.67782593
2016	227.801651
2017	267.07046509
2018	266.45422363
2019	274.94509888
2020	222.53158569
2021	279.91430664