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Capital Structure
9 Months Ended
Mar. 31, 2019
Capital Structure [Abstract]  
Capital Structure
12. Capital structure

     The following table presents a reconciliation between the number of shares, net of treasury, presented in the unaudited condensed consolidated statement of changes in equity during the nine months ended March 31, 2019 and 2018, respectively, and the number of shares, net of treasury, excluding non-vested equity shares that have not vested during the nine months ended March 31, 2019 and 2018, respectively:

  March 31,   March 31,  
  2019   2018  
 
Number of shares, net of treasury:        
Statement of changes in equity 56,815,925   56,855,187  
Less: Non-vested equity shares that have not vested (Note 14) (831,408 ) (934,673 )
Number of shares, net of treasury excluding non-vested        
equity shares that have not vested 55,984,517   55,920,514