Headline writing

So the headline says a fifth of graduate workers earn less than school-leavers, but the story says:

Analysis shows the median hourly pay for employees educated up to around GCSE or equivalent level was £8.68, for those at A-level or equivalent £10, up to higher education but below degree level £12.60, and for those with a degree £16.10.

Have I mentioned before that I don't understand news values?