EXPLANATORY NOTE

The purpose of this Amendment No. 1 to our Report on Form 6-K for the month of July 2012, as filed with the Securities and Exchange Commission on July 26, 2012 (the “Original Report”), is to furnish the interactive data files as Exhibit 101 to the Original Report. This Exhibit 101 was not previously filed with the Original Report. Exhibit 101 to this Amendment No. 1 provides the following items from the Original Report formatted in XBRL (Extensible Business Reporting Language): (i) our consolidated balance sheet as of December 31, 2011 and our unaudited consolidated balance sheet as of June 30, 2012, (ii) our unaudited consolidated statements of income for the six-month periods ended June 30, 2011 and 2012, (iii) our unaudited consolidated statements of comprehensive income for the six-month periods ended June 30, 2011 and 2012, (iv) our unaudited consolidated statements of stockholders’ equity for the six-month periods ended June 30, 2011 and 2012, (v) our unaudited consolidated statements of cash flows for the six-month periods ended June 30, 2011 and 2012 and (vi) the notes to our unaudited consolidated financial statements.

This Report on Form 6-K/A shall be incorporated by reference into our registration statement on Form F-3, as filed with the Securities and Exchange Commission on January 30, 2012 (File No. 333-179244), to the extent not superseded by documents or reports subsequently filed by us under the Securities Act of 1933 or the Securities Exchange Act of 1934, in each case as amended.

Users of this data are advised that pursuant to Rule 406T of Regulation S-T, these interactive data files are deemed not filed or part of any registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, are deemed not filed for purposes of Section 18 of the Securities and Exchange Act of 1934, and otherwise are not subject to liability under those sections.

No other changes have been made to the Original Report other than those described above. This Form 6-K/A does not reflect subsequent events occurring after the original filing date of the Original Report and does not, and does not purport to, modify, restate or update in any way disclosures made in the Original Report.