I want to know the answer to the following question:
How much of the Spanish population are Barcelona supporters?
All the background I'm provided with is that "The club's membership figures have seen a significant increase from 100,000 in the 2003–04 season to 170,000 in September 2009, the sharp rise being attributed to the influence of Ronaldinho and then-president Joan Laporta's media strategy that focused on Spanish and English online media.". Is that enough to answer the question?
Answer: no