Variació interanual
...........3,3....................3,3.................Gener 2011
...........3,6....................3,6.................Febrer 2011
...........3,6....................3,5.................Març 2011
...........3,8....................3,8.................Abril 2011
...........3,5....................3,5.................Maig 2011
...........3,2....................3,3.................Juny 2011
...........3,1....................3,2.................Juliol 2011
...........3,0....................3,0.................Agost 2011
...........3,1....................3,2.................Setembre 2011
...........3,0....................3,1.................Octubre 2011
...........2,9....................3,0.................Novembre 2011
...........2,4....................2,5.................Desembre 2011
...........2,0....................2,2..................Gener 2012
...........2,0....................2,2..................Febrer 2012
