 Therefore, the number of Hungarians in Slovakia dropped to 350,000.According to Russian archives, 20,000 Hungarians declared themselves as Slovak at the beginning of the year 1949, and eventually 360,000 Hungarians changed their ethnicity to Slovak, according to Slovak historians.The fear was so big among the Hungarian population, that only 350,000-367,000 claimed themselves Hungarian in the 1950 census, and only after ten years -when the reslovakization program was revoked- began to rose and reached 518000.