My turn to post something here. I hope it's not off-topic, as it involves the migrations flow worldwide - not just Europe.
Three researchers (Nikola Sander, Guy J. Abel and Ramon Bauer) at the Wittgenstein Center for Demography and Global Human Capital have developed a really fancy infographic that
[..] estimates of migration flows between and within regions for five-year periods, 1990 to 2010
The infographic is available at http://global-migration.info/ , together with all the info about how data has been collected and processed.
And no, Europe does not seem to be the first destination for migrants..