The 2018 Annual report on intra-EU labour mobility from the European Commission is now public and available for download here.

From the executive summary: The annual report provides updated information on labour-mobility trends in EU and EFTA countries. This year, the report also analyses the qualifications and the household’s composition of the EU-28 movers.

In 2017, there were 17 million EU-28 movers.  

The latest developments indicate that the large growth in mobility seen in 2015 and 2016, has slightly slowed down. Intra-EU mobility is still increasing but at a slower speed.