| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 May 2022 | 04 May 2022 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 Mar 2022 | 16 Mar 2022 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 May 2021 | 06 May 2021 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 May 2021 | 04 May 2021 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Mar 2021 | 17 Mar 2021 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 11 May 2020 | 08 May 2020 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 May 2020 | 06 May 2020 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 19 Mar 2020 | 18 Mar 2020 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Nov 2019 | 11 Nov 2019 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 May 2019 | 08 May 2019 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 May 2019 | 02 May 2019 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 May 2018 | 02 May 2018 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Nov 2017 | 29 Nov 2017 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 17 May 2017 | 16 May 2017 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 May 2017 | 04 May 2017 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 May 2017 | 03 May 2017 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Nov 2016 | 23 Nov 2016 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 23 Nov 2016 | 22 Nov 2016 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Jun 2016 | 08 Jun 2016 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 May 2016 | 04 May 2016 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 May 2016 | 09 May 2016 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Dec 2015 | 18 Dec 2015 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 30 Nov 2015 | 27 Nov 2015 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 24 Nov 2015 | 23 Nov 2015 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Sep 2015 | 18 Sep 2015 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Aug 2015 | 27 Aug 2015 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 May 2014 | 07 May 2014 | 000-18516 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Mar 2014 | 17 Mar 2014 | 000-18516 |