It depends on the total population (see footnote 1), which isn't given in the spreadsheet. But unless they've seriously redefined the total population, that figure is odd.

Still, the absolute number of self-employed has gone from 4.166m in 2013 Q1 to 4.554m in 2014 Q1. That's almost 400,000 more in one year, as against a much slighter annual variation in past years.

In fact, that's half of the job creation they claim over the past year.