| Country | Year | |||||
|---|---|---|---|---|---|---|
| Belarus | 2031 | 4,196,045 | 4,835,599 | 9,031,644 | ||
| Bulgaria | 2031 | 3,104,687 | 3,275,580 | 6,380,267 | ||
| Czechia | 2031 | 5,192,277 | 5,331,638 | 10,523,915 | ||
| Hungary | 2031 | 4,443,952 | 4,863,064 | 9,307,016 | ||
| Slovakia | 2031 | 2,554,335 | 2,720,251 | 5,274,586 | ||
| Moldova | 2031 | 1,438,655 | 1,481,201 | 2,919,856 | ||
| Poland | 2031 | 17,608,967 | 18,918,267 | 36,527,234 | ||
| Romania | 2031 | 9,766,425 | 10,362,800 | 20,129,225 | ||
| Russia | 2031 | 63,069,350 | 73,537,836 | 136,607,186 | ||
| Ukraine | 2031 | 19,094,163 | 22,018,787 | 41,112,950 |