| Country | Year | |||||
|---|---|---|---|---|---|---|
| Belarus | 2015 | 4,407,629 | 5,078,919 | 9,486,548 | ||
| Bulgaria | 2015 | 3,476,440 | 3,646,268 | 7,122,708 | ||
| Czechia | 2015 | 5,178,187 | 5,363,482 | 10,541,669 | ||
| Hungary | 2015 | 4,669,882 | 5,136,694 | 9,806,576 | ||
| Slovakia | 2015 | 2,614,571 | 2,776,507 | 5,391,078 | ||
| Moldova | 2015 | 1,703,583 | 1,800,670 | 3,504,253 | ||
| Poland | 2015 | 18,480,641 | 19,704,899 | 38,185,540 | ||
| Romania | 2015 | 10,441,738 | 11,026,723 | 21,468,461 | ||
| Russia | 2015 | 65,047,806 | 75,714,897 | 140,762,703 | ||
| Ukraine | 2015 | 20,314,279 | 23,635,847 | 43,950,126 |