Until the 1970s, prostitutes in the Netherlands were predominantly white lower-class women from the Netherlands, Belgium, France, and Northern Germany. During the 1970s, in the wake of the sex trips to South-East Asia by Dutchmen, the sex operators brought in women from Thailand and the Philippines. In the 1980s there was a second wave from Latin America and Africa. In the 1990s, after the fall of the Soviet Union, women came from Eastern Europe. Foreign prostitutes are economically motivated to come to the Netherlands, and they tend to travel to engage in sex work between the Netherlands, Germany, Belgium, and other European societies.