| Characteristic | List of agencies offering this type of tour |
|---|---|
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
| - | - |
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Source
Release date
December 2018
Region
Worldwide
Survey time period
August 20 - September 30, 2018
Number of respondents
959 respondents
Special properties
112 countries worldwide
Method of interview
Online survey
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