Population Change in Eastern European Countries since 1991. Eastern Europe has mostly lost population since 1991, with Ukraine experiencing the largest decline at more than 36%. The Baltic states, Bulgaria, Romania, and Moldova also show heavy decreases, while Russia has a smaller overall drop. In contrast, Czechia and Slovakia stand out as the only countries in this group that recorded population growth. Credits to @explainedreality #usa #Europe #population #bulgaria #roman | Reality Explained