Simplify the following text for a Grade 6 native English-speaking person.
Original: His popularity in France went down during the 1870s after the Second Empire , and he fled France , but during the last years of his life , his popularity rebounded , and several of his operettas are still performed .
Simplified: He fled France , but during the last years of his life , his popularity came back . Several of his operettas are still performed .