| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 - | 26 May 2021 | 25 May 2021 | 000-33043 |
| 4 | Open Document | Open Filing | FORM 4 - | 27 May 2020 | 26 May 2020 | 000-33043 |
| 4 | Open Document | Open Filing | FORM 4 - | 15 May 2019 | 14 May 2019 | 000-33043 |
| 4 | Open Document | Open Filing | FORM 4 - | 16 May 2018 | 15 May 2018 | 000-33043 |
| 4 | Open Document | Open Filing | FORM 4 - | 24 May 2017 | 23 May 2017 | 000-33043 |
| 4 | Open Document | Open Filing | FORM 4 - | 25 May 2016 | 24 May 2016 | 000-33043 |
| 4 | Open Document | Open Filing | FORM 4 - | 21 May 2015 | 20 May 2014 | 000-33043 |
| 3 | Open Document | Open Filing | FORM 3 - | 21 May 2015 | 20 May 2014 | 000-33043 |