| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2021 | 13 May 2021 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Nov 2020 | 11 Nov 2020 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 May 2019 | 03 May 2019 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 May 2018 | 03 May 2018 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 May 2017 | 04 May 2017 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2016 | 12 May 2016 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Mar 2016 | 02 Mar 2016 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Feb 2016 | 26 Feb 2016 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Feb 2016 | 22 Feb 2016 | 001-13738 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Feb 2016 | 19 Feb 2016 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Feb 2016 | 19 Feb 2016 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 May 2015 | 22 May 2015 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 May 2015 | 29 Apr 2015 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2014 | 08 May 2014 | 001-13738 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Feb 2014 | 11 Feb 2014 | 001-13738 |