Year	current US$
2000	50.087206595764876
2001	48.89959620982152
2002	49.49619234953797
2003	47.22109088248845
2004	51.63789139011774
2005	56.876444191329625
2006	63.02952986733376
2007	74.36735100585378
2008	87.912185034542
2009	88.89960582154711
2010	97.0224892467131
2011	104.16919329782866
2012	118.55816838571671
2013	130.42677671901308
2014	136.5037809969651
2015	138.7500649089591
2016	135.22658618969558
2017	138.32985658270832
2018	146.1383249138494
2019	146.7418809393542
2020	136.00593075729253
2021	142.9342685221796