A note - people of the same ethnicity are defined by sharing the same common cultural background or descent, so there's a huge variability among self-identifying Russians, they can't be separated from the other ethnicities by certain alleles of genes. Historically Russians were mixing up with other ethnicities that lived in regions, and also people who moved to Russia often started to call themselves "Russians" in the second or third generation, so percentages here are more cultural than anything else.