| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 May 2021 | 20 May 2021 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 May 2020 | 13 May 2020 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 May 2019 | 07 May 2019 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Aug 2018 | 06 Aug 2018 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 May 2018 | 08 May 2018 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Sep 2017 | 11 Sep 2017 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Sep 2017 | 31 Aug 2017 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 16 Aug 2017 | 14 Aug 2017 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 May 2017 | 09 May 2017 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2016 | 10 May 2016 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jun 2015 | 19 May 2015 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 18 Feb 2015 | 13 Feb 2015 | 000-11204 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 05 Jun 2014 | 06 May 2014 | 000-11204 |