| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 May 2023 | 24 May 2023 | 001-41040 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2022 | 18 May 2022 | 001-41040 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 May 2021 | 19 May 2021 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Feb 2021 | 26 Jan 2021 | 000-19848 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2021 | 02 Jan 2021 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2020 | 20 May 2020 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Mar 2020 | 28 Feb 2020 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2019 | 22 May 2019 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 May 2018 | 23 May 2018 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 May 2017 | 24 May 2017 | 000-19848 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 27 May 2016 | 25 May 2016 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 May 2016 | 25 May 2016 | 000-19848 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 06 Apr 2016 | 04 Apr 2016 | 001-31396 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Sep 2015 | 01 Sep 2015 | 001-31396 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2015 | 20 May 2015 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jul 2014 | 01 Jul 2014 | 001-31396 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 May 2014 | 21 May 2014 | 000-19848 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Feb 2014 | 20 Feb 2014 | 001-31396 |