18/04/11 02/05/2011 17/05/2011 31/01/2012
BPEL
 6.25
6.6
6.69
 6.9
NBPEL
 5.7 5.9 6 6.3
EG
 4.9
 5.0
5.2
 5.2
VOLUME
 184 200
 217
 218
% increase ---
 8% 15.3% 15.6%