 It is difficult to estimate the distribution of the Orthodox and the Greek Catholics by the language as well as to determine the number of Rusyns because both the Hungarian and Czechoslovakian censuses provided the incorrect number of Rusyns, but it contains roughly 50-100 000 people.According to censuses the decrease of the number of Rusyns was influenced not only by Slovakization but also by emigration of a significant number of Rusyns from Prešov, mainly to the Czech lands.The Slovak pressure on Rusyns in Slovakia increased after 1919 when Czechoslovakia incorporated Transcarpathia to the east of the Uzh River.