| Charges to Access RTN | Response Frequency | Percent (%) |
| Annual subscription fee | 1 | 3.6 |
| Annual subscription fee, Less-than-a-year subscriptions fee, Charges based on access duration | 1 | 3.6 |
| Annual subscription fee, Less-than-a-year subscriptions fee | 1 | 3.6 |
| Annual subscription fee, Other, please specify: | 2 | 7.1 |
| Free of cost | 17 | 60.7 |
| Free of cost, Annual subscription fee | 1 | 3.6 |
| Free of cost, Annual subscription fee, Less-than-a-year subscriptions fee | 1 | 3.6 |
| Free of cost, Annual subscription fee, Less-than-a-year subscriptions fee, Charges based on access duration, Other, please specify: | 1 | 3.6 |
| Free of cost, Annual subscription fee, Other, please specify: | 1 | 3.6 |
| Other, please specify: | 2 | 7.1 |