| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | 4 | 02 Jun 2021 | 28 May 2021 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 19 Apr 2021 | 15 Apr 2021 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 20 Jan 2021 | 19 Jan 2021 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 18 Dec 2020 | 17 Dec 2020 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 02 Dec 2020 | 30 Nov 2020 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 18 Nov 2020 | 16 Nov 2020 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 04 Feb 2020 | 31 Jan 2020 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 18 Dec 2019 | 16 Dec 2019 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 27 Nov 2019 | 25 Nov 2019 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 19 Nov 2019 | 15 Nov 2019 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 18 Dec 2018 | 17 Dec 2018 | 000-21272 |
| 3 | Open Document | Open Filing | 3 | 11 Dec 2018 | 03 Dec 2018 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 01 Nov 2017 | 30 Oct 2017 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 25 Apr 2017 | 21 Apr 2017 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 17 Nov 2016 | 02 Nov 2015 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 03 Nov 2016 | 01 Nov 2016 | 000-21272 |
| 3 | Open Document | Open Filing | 3 | 22 Sep 2016 | 12 Sep 2016 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 18 Nov 2015 | 16 Nov 2015 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 24 Nov 2014 | 20 Nov 2014 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 19 Nov 2014 | 17 Nov 2014 | 000-21272 |