| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 20-F | Open Document | Data | Open Filing | 20-F | 30 Apr 2025 | 31 Dec 2024 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | 30 Apr 2024 | 31 Dec 2023 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | 01 May 2023 | 31 Dec 2022 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | 02 May 2022 | 31 Dec 2021 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | 30 Apr 2021 | 31 Dec 2020 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | FORM 20-F | 29 Apr 2020 | 31 Dec 2019 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | 30 Apr 2019 | 31 Dec 2018 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | FORM 20-F | 30 Apr 2018 | 31 Dec 2017 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | 01 May 2017 | 31 Dec 2016 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | 02 May 2016 | 31 Dec 2015 | 000-33051 |
| 6-K | Open Document | Open Filing | FORM 6-K | 02 May 2016 | 29 Apr 2016 | 000-33051 |
| 6-K | Open Document | Open Filing | FORM 6-K | 03 Aug 2015 | 31 Jul 2015 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | FORM 20-F | 30 Jun 2015 | 31 Dec 2014 | 000-33051 |
| 20-F | Open Document | Data | Open Filing | 20-F | 01 May 2014 | 31 Dec 2013 | 000-33051 |
| NT 20-F | Open Document | Open Filing | NT 20-F | 01 May 2014 | 31 Dec 2013 | 000-33051 |
| 6-K | Open Document | Open Filing | FORM 6-K | 30 Apr 2014 | 30 Apr 2014 | 000-33051 |
| 6-K | Open Document | Open Filing | 6-K | 24 Mar 2014 | 24 Mar 2014 | 000-33051 |
| 20-F/A | Open Document | Data | Open Filing | FORM 20-F/A | 30 May 2013 | 31 Dec 2012 | 000-33051 |
| 20-F | Open Document | Open Filing | FORM 20-F | 30 Apr 2013 | 31 Dec 2012 | 000-33051 |
| 20-F/A | Open Document | Data | Open Filing | FORM 20-F/A | 31 May 2012 | 31 Dec 2011 | 000-33051 |
| 20-F/A | Open Document | Data | Open Filing | FORM 20-F/A | 30 May 2012 | 31 Dec 2011 | 000-33051 |
| 20-F | Open Document | Open Filing | FORM 20-F | 30 Apr 2012 | 31 Dec 2011 | 000-33051 |