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| Form | Description | Date | Format |
|---|---|---|---|
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Sep 5, 2019 |     |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Sep 5, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Jul 26, 2019 | |
| 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 | Jul 3, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Jun 10, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | May 29, 2019 | |
| 20-F | Registration of securities of foreign private issuers pursuant to section 12(b) or (g) | Apr 25, 2019 |   |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Apr 24, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Mar 28, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Feb 19, 2019 | |
| 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 | Feb 14, 2019 | |
| 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 | Feb 14, 2019 | |
| 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 | Feb 13, 2019 | |
| 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 | Feb 12, 2019 | |
| 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 | Feb 1, 2019 | |
| 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 | Feb 1, 2019 | |
| 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 | Feb 1, 2019 | |
| 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 | Feb 1, 2019 | |
| 6-K | Report of foreign issuer rules 13a-16 and 15d-16 of the Securities Exchange Act | Nov 23, 2018 | |