| Characteristic | Revenue in billion U.S. dollars |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Sources
Release date
January 2021
Region
Worldwide
Survey time period
2015 to 2020
Supplementary notes
Figures for periods other than 2018 come from previous reporting.
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