Year	current US$
1992	4.668467892923351
1993	21.035269585367747
1994	37.90392225856527
1995	53.65099512519626
1996	44.12539878306521
1997	39.962522927301976
1998	41.142798639938555
1999	42.05644312953868
2000	39.47207375949616
2001	26.17136117954035
2002	31.763080183633758
2003	34.5607049058668
2004	40.494055814027654
2005	46.075619865414325
2006	51.84730905231373
2007	39.67807935732538
2008	54.20873659432173
2009	47.32599042826166
2010	68.29053553569669
2011	79.4001351596785
2012	83.90818772905817
2013	94.31603822068519
2014	107.3721201823698
2015	130.05254779711865
2016	85.44945969806317
2017	75.01694059899697
2018	69.42019242673831
2019	68.66577976584043
2020	72.02085360696029
2021	66.80396702311616
2022	104.61798910479447