I don't want to sound condescending, but in case you weren't aware, a decade (which is what you said) is ten years, which means since 2006, not 2009. So, you're wrong. If you'd said 2009, you'd be correct. Maybe if you'd looked into it, you'd have said 2009, and therefore be correct. But you clearly didn't, so c'est la vie. Trying to dance around the argument and squabble over bit-parts does not make you any less incorrect.
Unlike you I won't resort to petty little insults in a debate about our country and the EU. I've proven that immigration is not as big an issue as you claim it is, because we have received more workers than we have lost in the last ten years.
Immigration hit its highest since before the recession in 2015 so it's not a stretch to say that it will get back to pre-recession levels (i.e. higher than emigration) again, likely this year, actually. Emigration is dropping and immigration is rising.
EDIT: Oh and 'third level' is simply not something that you can factually prove, that's pure guesswork on your part, actually, and I'd still wager you are wrong. The closest we have to proving it is overall immigration vs emigration.