Significant Russian immigration was also connected with the Virgin Lands Campaign and Soviet space program during the Khrushchev era. In 1989, ethnic Russians were 37.8% of the population and Kazakhs held a majority in only 7 of the 20 regions of the country. Before 1991 there were about 1 million Germans in Kazakhstan, mostly descendants of the Volga Germans deported to Kazakhstan during World War II. After the break-up of the Soviet Union, most of them emigrated to Germany. Most members of the smaller Pontian Greek minority have emigrated to Greece. In the late 1930s thousands of Koreans in the Soviet Union were deported to Central Asia. These people are now known as Koryo-saram.