| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 25, 2023 | May 24, 2023 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 31, 2022 | May 27, 2022 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 28, 2022 | Mar 25, 2022 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 1, 2021 | May 28, 2021 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 11, 2021 | May 7, 2021 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 15, 2020 | Dec 14, 2020 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 13, 2020 | Nov 11, 2020 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 1, 2020 | May 29, 2020 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2020 | Mar 2, 2020 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 3, 2019 | May 30, 2019 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 2, 2019 | May 2, 2019 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 22, 2019 | Mar 21, 2019 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 1, 2018 | Jun 1, 2018 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 2, 2017 | May 31, 2017 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 13, 2016 | May 11, 2016 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 14, 2015 | May 13, 2015 | 001-13561 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 16, 2014 | May 15, 2014 | 001-13561 |