Year	current US$
2000	46.8312645
2001	44.34126282
2002	50.72472382
2003	53.21016693
2004	60.82519913
2005	59.98478699
2006	65.47128296
2007	70.28305054
2008	79.23954773
2009	80.40415955
2010	96.36509705
2011	110.27568817
2012	114.38260651
2013	126.3875351
2014	104.33917236
2015	114.26020813
2016	80.8219223
2017	83.77519226
2018	102.07511902
2019	101.97441101
2020	116.55925751
2021	133.15092468