| Characteristic | Number of operators |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Sources
Release date
March 2019
Region
Netherlands
Survey time period
2010 to 2017
Supplementary notes
This figure have been taken from several publications.
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