““The driver, who had lived in East Berlin until the wall fell in 1989, was happy to report that Berlin was currently the most popular tourist destination in Germany and one of the top three in Europe. During the previous year, nearly thirty million people had visited Berlin, which had only three and a half million permanent residents. The influx of tourists had put a strain on the city’s housing market, making it tough for Berliners to find a decent apartment to rent. Many estate agents and other enterprising individuals were now signing annual leases on apartments simply to sublet them to tourists on sites like Airbnb.””