For Germany the numbers publicly reported have gotten more conrete the last few weeks. While there are only few doses for the first quater (about 18mio for 9 mio people ~ 11% of the population), in the second quarter there will be lots of doses delivered. Confirmed numbers are, that doses for over 40 million people will be delivered in the second quarter (including some one time vaccines from Johnson&Johnson, as also with them there were contracts). Together with the 9 mio from the first, that is 49mio people (~61%) in the first half of 2021. So while it started slow (as was to expect), numbers will start rising soon.
These numbers were only for Germany, I don't know exactly how this reflects for Europe, but as all orders were made Europe-wide, I guess this is similar for the whole EU, at least that was the whole point for having a Europe-wide strategy.