Year	current international $
2008	3661.0071544638295
2009	3755.2287842742307
2010	3909.949627005654
2011	4070.7242107485963
2012	4214.722569791189
2013	4391.297756153451
2014	4624.295710503749
2015	4720.895664129154
2016	4795.269932804054
2017	4868.698724878713
2018	5047.424368411985
2019	5230.483857978843
2020	5246.312393604718
2021	5547.728016853909
2022	6042.2815530975595
2023	6270.930701360964