Ukraine has an aging population, is it that hard to believe that 10% are old and infirm, especially considering that Ukraine has a crappy public health system AND the buildings, as you well know, are not equiped for invalids so it is very hard for the old to leave their homes and get back in.
Try 15%:
Age structure:
0-14 years: 15.6% (male 3,783,725/female 3,619,754)
15-64 years: 68.8% (male 15,619,989/female 16,992,628)
65 years and over: 15.6% (male 2,497,851/female 4,911,389) (2005 est.)
From cia.gov