| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 3 | Open Document | Open Filing | 26 May 2021 | 25 May 2021 | 811-23635 | |
| 4 | Open Document | Open Filing | 15 Sep 2017 | 14 Sep 2017 | 001-06089 | |
| 4 | Open Document | Open Filing | 19 Jun 2017 | 15 Jun 2017 | 001-06089 | |
| 4 | Open Document | Open Filing | 09 Sep 2016 | 08 Sep 2016 | 001-06089 | |
| 4 | Open Document | Open Filing | 14 Sep 2015 | 10 Sep 2015 | 001-06089 | |
| 4 | Open Document | Open Filing | 25 Jun 2015 | 23 Jun 2015 | 001-06089 | |
| 4 | Open Document | Open Filing | 12 Sep 2014 | 11 Sep 2014 | 001-06089 | |
| 4 | Open Document | Open Filing | 13 Jun 2014 | 12 Jun 2014 | 001-06089 |