| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Jul 2021 | 24 Jul 2021 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Feb 2021 | 02 Feb 2021 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jan 2021 | 31 Dec 2020 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Dec 2020 | 22 Dec 2020 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Oct 2020 | 26 Oct 2020 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Jul 2020 | 24 Jul 2020 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Jun 2020 | 23 Jun 2020 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Mar 2020 | 06 Mar 2020 | 000-15572 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 11 Feb 2020 | 04 Feb 2020 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Feb 2020 | 04 Feb 2020 | 000-15572 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Feb 2020 | 31 Dec 2019 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Dec 2019 | 20 Dec 2019 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Jun 2019 | 25 Jun 2019 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Feb 2019 | 05 Feb 2019 | 000-15572 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Feb 2019 | 31 Dec 2018 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jan 2019 | 31 Dec 2018 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Jul 2018 | 24 Jul 2018 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jun 2018 | 01 Jun 2018 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2018 | 17 May 2018 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Feb 2018 | 06 Feb 2018 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Dec 2017 | 27 Dec 2017 | 000-15572 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Aug 2017 | 25 Jul 2017 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Jul 2017 | 25 Jul 2017 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 May 2017 | 04 May 2017 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 Mar 2017 | 31 Dec 2016 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Feb 2017 | 07 Feb 2017 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Sep 2016 | 30 Aug 2016 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Jun 2016 | 24 Jun 2016 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 Mar 2016 | 31 Dec 2015 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Feb 2016 | 23 Feb 2016 | 000-15572 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Feb 2015 | 24 Feb 2015 | 000-15572 |