Last month on SI's forums, someone posted some screenshots from FM11 after they'd gone on holiday until December 2330.
One of the screenshots was of the European Championships from 2192 to 2328, showing who the top three were plus the hosts of each tournament, and I just noticed something in the pic. In real life, there have been 13 Euros so far and 11 different hosts (Italy ('68 and '80) and France ('60 and '84) are the only countries to have hosted twice...I'm counting the Holland/Belgium and Austria/Switzerland things as one host each rather than two hosts for each tournament)
In this screenshot, there have been 35 tournaments and only 6 different hosts - every single tournament has been held by one of: Spain (8 tournaments), Germany (8), England (7), France (4), Italy (4) or Portugal (4)...and the 2332 tournament is scheduled to be held in England as well.
World cups were largely similar, though with a little more variety...Australia, Brazil, China, France, Italy, Japan, Mexico, Portugal, South Africa, South Korea, USA...the host nation was always one of those eleven. Again, 35/36 tournaments, and all 11 mentioned nations hosting between two and four tournaments each over a ~140 year period (2194 - 2330/34)
Bit of a shame that there's so little variety in the nations there. Also surprising that Iceland (the league this guy had running) never featured. Five stadia in the country could hold at least 85,000 and there were a few more than could hold 50,000+ but the guy said that Iceland had only hosted a few Champions League / Europa League finals and nowt more.