Year	current US$
2000	71.04542405059757
2001	66.84433137999481
2002	68.92097690391157
2003	78.45549208573935
2004	85.95180336678169
2005	91.07018691364463
2006	96.63225088063625
2007	103.45403418500277
2008	120.10078630313852
2009	129.96423171525933
2010	146.92467621350593
2011	171.9858609330352
2012	184.9997857185395
2013	187.96400959683035
2014	192.78162816324246
2015	189.48873600193724
2016	201.9060863421731
2017	219.31741066255958
2018	242.97083800681847
2019	254.43651232120325
2020	268.004580193937
2021	302.54198541123355