| 4 | Statement of changes in beneficial ownership of securities | May 6, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | May 6, 2013 |    |
| ARS | An annual report to security holders. | May 1, 2013 |    |
| DEF 14A | Official notification to shareholders of matters to be brought to a vote ("Proxy") | Apr 17, 2013 |     |
| 4 | Statement of changes in beneficial ownership of securities | Apr 15, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Apr 10, 2013 |    |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Apr 10, 2013 |     |
| 4 | Statement of changes in beneficial ownership of securities | Apr 3, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Apr 3, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Apr 3, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Apr 3, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Apr 3, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Apr 3, 2013 |    |
| SC 13G/A | Amendment to a previously filed SC 13G | Mar 29, 2013 |     |
| 10-K | Annual report which provides a comprehensive overview of the company for the past year | Mar 28, 2013 |       |
| 4 | Statement of changes in beneficial ownership of securities | Mar 28, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Mar 28, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Mar 28, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Mar 28, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Mar 28, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Mar 28, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Mar 28, 2013 |    |
| 4/A | Amendment to a previously filed 4 | Mar 28, 2013 |    |
| 4 | Statement of changes in beneficial ownership of securities | Mar 27, 2013 |    |
| 8-K | Report of unscheduled material events or corporate event | Mar 19, 2013 |     |