Unfortunately we cant provide figures for this, it depends on the provider in the country they are calling from. As with all network providers they change their rates regularly and so it would be very hard for us to provide accurate rates for all providers in all countries.
We are currently looking into obtaining our own local numbers in European countries. We will be starting with the most commonly requested so if there is a particular country you would like us to include please let us know.
To avoid any nasty surprises we recommend the caller check the rate with their local provider.