Year	current international $
2013	3809.8608004773323
2014	4022.347167647819
2015	4323.515881166651
2016	4493.895140976561
2017	4742.388482193021
2018	5153.716538782316
2019	5471.96329378911
2020	5676.305934320819
2021	6032.27795593735
2022	6606.3876803625435
2023	7204.048435597214