72 ANNUAL REPORT  2013  KATHMANDU Basic earnings per share is calculated by dividing the profit attributable to equity holders of the Company by the weighted average  number of ordinary shares in issue during the year. Diluted earnings per share is calculated by adjusting the weighted average number of shares outstanding to assume conversion of all  dilutive potential ordinary shares. The Group’s dilutive potential ordinary shares are in the form of share options / performance rights. 28 EARNINGS PER SHARE 29 EARTHQUAKE DISCLOSURES 30 EVENTS OCCURRING AFTER THE BALANCE DATE •  Net proceeds received to date of $293,000 (2012: $0) arising from the business interruption and material damage claim relating  to this has been recognised in the financial statements. The claim has still to be finally agreed with the insurers. •  All assets lost or damaged as a result of the earthquake have been written off, and the cost of this write-off is included in the  calculation of net proceeds above. The Christchurch earthquake that occurred on 22 February 2011 did not have a significant impact on trading. Kathmandu has business  interruption insurance that provided cover for this event. Kathmandu’s Cashel Street store was damaged in the earthquake and the  lease of that store has since been terminated. In the financial statements: There are no events occurring after balance date that materially affect the information within the financial statements. 2013 2012 ’000 ’000 Weighted average number of shares in issue 200,197 200,000 Adjustment for: - Share options / performance rights 1,924 3,121 Total potential diluted ordinary shares  202,121 203,121