| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 May 2022 | 10 May 2022 | 001-39110 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2021 | 11 May 2021 | 001-39110 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2020 | 12 May 2020 | 001-39110 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 May 2019 | 22 May 2019 | 000-13470 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 24 May 2018 | 22 May 2018 | 000-13470 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 25 May 2017 | 23 May 2017 | 000-13470 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 26 May 2016 | 24 May 2016 | 000-13470 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 20 May 2015 | 19 May 2015 | 000-13470 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 22 May 2014 | 20 May 2014 | 000-13470 |