Note that this is specifically for people aged 16-24 in full time work. And people that go to university don't appear in the statistics until age 22 or so, as

Note that this is specifically for people aged 16-24 in full time work. And people that go to university don't appear in the statistics until age 22 or so, as they're not in full-time work. Meaning people who leave school at 16 contribute to the annual statistics 8 times, while university graduates only contribute 2 times. And among those who leave school at 16 and become apprentice plumbers or electricians - they're not going to be making decent money until they're good enough not to need close supervision.