Answers (2)
Research states that between 90%[1] and 93%[2] of the Dutch population claims to be able to converse in English. According to some, the main reasons for the high degree of English speakers is the country's small size, dependency on international trade, and the use of subtitles for foreign languages on television rather than audio dubbing.[3] Furthermore, it is (besides Dutch) an official language of the municipality of Amsterdam. [4]
en.wikipedia.org/wiki/English_in_the_Netherlands
I would expect about the same number of people to speak French and German, just because almost everybody in Europe speaks three or more languages at least a little bit.