| Characteristic | March | June | September | December |
|---|---|---|---|---|
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
| - | - | - | - | - |
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Source
Release date
September 2016
Region
Worldwide
Survey time period
2012 to 2016
Supplementary notes
* December figures for 2016 were not available at time of publication and September 2016 figures represent the midpoint of the source's 195-215 estimate.
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