Spanish opinion poll: Correlations

[RedWorker]

So I took a recent Spanish opinion poll and did some interesting correlations.

Orange: Proletarian, stable employment.
Green: Proletarian, temporary employment.
Blue: Bourgeois and petty bourgeois.
Red: Petty bourgeois, self employed.

Political alignment, 1 being far left and 10 being far right:

http://i.imgur.com/LBPdKCM.png

Vote+sympathy for political parties in the next general elections:

http://i.imgur.com/A7iDOor.png

Religion:

http://i.imgur.com/30lnBMc.png

[Rafiq]

What was the sample size? Any regard for regional differences? Also, there is ambiguity regarding the class differences. It would be interesting to contrast the differences between the bourgeoisie and the petite-bourgeoisie, and to separate the "self-employed" in terms of whether they belong to the intelligentsia (artists, etc.) or are petty artisans, street peddlers and so on.