15. Earnings per share

Earnings per share are calculated as follows:

1st half of 2013 11st half of 2012
    
Net profit €/000 24,960 33,792
Earnings attributable to ordinary shares €/000 24,960 33,792
Average number of ordinary shares in circulation 359,777,816 364,463,106
Earnings per ordinary share 0.069 0.093
Adjusted average number of ordinary shares 360,398,207 365,142,135
Diluted earnings per ordinary share 0.069 0.093

The potential effects deriving from stock option plans were considered when calculating diluted earnings per share.