| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jul 2021 | 23 Jul 2021 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Aug 2020 | 07 Aug 2020 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Jul 2020 | 29 Jul 2020 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Aug 2019 | 05 Aug 2019 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Aug 2019 | 31 Jul 2019 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Sep 2018 | 31 Aug 2018 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jul 2018 | 25 Jul 2018 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Aug 2017 | 31 Jul 2017 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Jul 2017 | 26 Jul 2017 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Aug 2016 | 01 Aug 2016 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Jul 2016 | 27 Jul 2016 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Aug 2015 | 04 Aug 2015 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Jul 2015 | 29 Jul 2015 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Aug 2014 | 05 Aug 2014 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Jul 2014 | 30 Jul 2014 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Aug 2013 | 06 Aug 2013 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Aug 2013 | 31 Jul 2013 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 21 Dec 2012 | 19 Dec 2012 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jul 2012 | 25 Jul 2012 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Feb 2012 | 07 Feb 2012 | 001-13252 |