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Net Income Per Ordinary Share
3 Months Ended
Mar. 31, 2013
Net Income Per Ordinary Share
6. Net income per ordinary share

Basic net income per ordinary share has been computed by dividing net income available to ordinary shareholders by the weighted average number of ordinary shares outstanding during the period. Diluted net income per ordinary share is computed by adjusting the weighted average number of ordinary shares outstanding during the period for all potentially dilutive ordinary shares outstanding during the period and adjusting net income for any changes in income or loss that would result from the conversion of such potential ordinary shares. There is no difference in net income used for basic and diluted net income per ordinary share.

The reconciliation of the number of shares used in the computation of basic and diluted net income per ordinary share is as follows:

   
Three Months Ended
 
   
March 31,
   
March 31,
 
   
2013
   
2012
 
Weighted average number of ordinary shares outstanding for basic net income per ordinary share
    60,404,242       60,086,104  
                 
Effect of dilutive share options outstanding
    919,352       622,365  
Weighted average number of ordinary shares for diluted net income per ordinary share
    61,323,594       60,708,469