| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 May 2023 | 24 May 2023 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 May 2022 | 27 May 2022 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jun 2021 | 28 May 2021 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jun 2020 | 29 May 2020 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jun 2019 | 30 May 2019 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jun 2018 | 01 Jun 2018 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jun 2017 | 31 May 2017 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2016 | 11 May 2016 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2015 | 13 May 2015 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 May 2014 | 15 May 2014 | 001-13561 |