2005 Spanish European Constitution referendum
Results

Choice
Votes
%
For
11,057,563
81.8
Against
2,453,002
18.2
Blank ballots
856,664
–
Invalid votes
124,523
–
Total
14,491,852
100
Registered voters/turnout
34,692,491
41.8
Source: Nohlen & Stöver, European Election Database
Source: Nohlen & Stöver, European Election Database
Source: Nohlen & Stöver, European Election Database

Question: What percentage approved the 2005 Spanish European Constitution referendum, and what was the percentage of voter turnout?
Answer: Constitution of the European Union was approved by 81.8% of voters, turnout was 41.8%.