What percentage of people travel overseas?

It all depends on how we interpret your question, but taking the easy way out Germany and Norway top the list. 80% of Germans and about 70% of Norwegians travel abroad. Followed by the Dutch and then the Danish. The number of days abroad remains constant at 15/16 days although there is an increasing number of the population that remain about 21 days. These figures have remained stable since the mid 1970's