The last poll showed that 44.3 percent backed a split from Spain, while 48.5 percent want to continue with the status quo.
Real Madrid is the European champion for the third time in four seasons, defeating Juventus 4-1 in the UEFA Champions League final at the Millennium Stadium in Cardiff.
The coach raised the Copa del Rey after Barcelona defeated Alaves 3-1 in the final on Saturday.
France, along with Spain, Greece, Britain, will continue to face disciplinary procedures for its excessive budget deficit.
Real Madrid have wrapped up their first Spanish title since 2012 after holding off the challenge of Barcelona on the final day.