I do wonder what the difference in percentage of unemployed is. Comparing the 55 to 70 for example with 16 to 31?
Ah, what's tricky about that is...
Most people retire about age 63. But they often 'retire' and start drawing pension from one job while taking on other paid work PT going forward. Some retire because they want to and some because they have to (health problems). Some because they can't get the jobs they want & retirement is an option. So they need to be out of the pile of those being counted in the denominator -- of those who want to be working.
Some ONS data but they stop counting at age 64?
People age 18-30 AND age 55-70 often want to work PT. So you can't compare their raw hours & find out if there's meaningful discrimination or inequity in opportunity.
The right way to ask people "Are you working as many hours as you want" or "Do you have the opportunity to work as many hours as you want..." It's tricky.
Are people under 25 still allowed to be paid a lower wage than age 25+? This gives them a slight employability advantage, but not necessarily one they like.
Somehow you'd want to ask
"Are you seeking work, are you in work, or Would you like to be working?" (Yes)
"Are you physically able to work, and do your care or study duties allow you to work?" (Yes)
"Have you fully retired already?" (No)
(sum of those with preceding answers = X & Y)
"Do you have as much paid employment as you would like" (Yes or No)
and then count the Nos as %s of X & Y to compare any 2 groups. Maybe!