Year	current US$
1993	3140.7145343110333
1994	3678.534849524923
1995	4562.838160904056
1996	5106.750493621022
1997	4648.370185713623
1998	5004.37731916615
1999	4843.718726472618
2000	4584.305928142587
2001	5013.579633846223
2002	6065.42088764041
2003	7403.995126189714
2004	8761.890754352085
2005	10122.688799203152
2006	11309.785249799954
2007	13667.796777466136
2008	16823.85388734909
2009	14319.404179343974
2010	14232.53146455304
2011	15447.399675160976
2012	14334.344304900158
2013	14511.85954983474
2014	14284.856685489418
2015	12903.368094770947
2016	13479.639182783772
2017	15315.25211198725
2018	17451.20066787583
2019	17471.655286562054
2020	16844.235107959368
2021	19843.782905674994