| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 May 2023 | 15 May 2023 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2022 | 11 May 2022 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 May 2021 | 07 May 2021 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2020 | 11 May 2020 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2019 | 22 May 2019 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 May 2018 | 14 May 2018 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Dec 2017 | 06 Dec 2017 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 May 2017 | 12 May 2017 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Nov 2016 | 28 Nov 2016 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2016 | 12 May 2016 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Feb 2016 | 12 Feb 2016 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 May 2015 | 06 May 2015 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Nov 2014 | 06 Nov 2014 | 001-15943 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 May 2014 | 07 May 2014 | 001-15943 |