A good start could be comparing with what are you going to compete:
For instance Country Reports charge differently based on the use of their reports, e.g.:
- elementary school: 58 usd/year
- business subscriptions: 249 usd/year
Perhaps now you should research how would you segment your market, which type of customers are you going to serve and which are their alternatives (other competitors).
Rule of thumb: if the customer perceives is getting more from you than from Country Reports reports you are going to be able to charge more than them.
You should read the following answer on Pricing accordingly to competitors by Hartley, or directly his blog article(a bit longer).
Bear in mind that the exact price is not a guess, you should continue your research on other competitors, and try different segmentations according to the industry if you are targeting business companies see Gartner classification for instance.