Graphs from the Russian Lost Armour site on DNR losses from the war. According to their data, DNR forces have sustained 2057 KIA and 8526 WIA for a total of 10,583 casualties. The losses were the heaviest from late March-late April.
t.me/lostarmour/456
vk.com/milinfolive?w=wall-123538639_2678739

They note that this means the DNR's 1st Army Corps has sustained approximately 50% casualties from this war. Not clear if these figures include mobilized units, or only permanent readiness units. The timing of the heavy losses is when the fighting in Mariupol was at its peak. 2/

It seems Lost Armor's data was from the DNR's official figures, which state that the DNR's military/security services have sustained 2,061 KIA and 8,509 WIA so far during the war. 3/
ombudsman-dnr.ru/obzor-soczialno-gumanitarnoj-situaczii-slozhivshejsya-na-territorii-doneczkoj-narodn...

4/

According to the Russian proxy DNR's official figures, DNR military/security services have sustained 3,746 KIA and 15,794 WIA in 2022. 5/
ombudsman-dnr.ru/obzor-soczialno-gumanitarnoj-situaczii-slozhivshejsya-na-territorii-doneczkoj-narodn...