| 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 | 31 Jul 2020 | 29 Jul 2020 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Aug 2019 | 31 Jul 2019 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2019 | 13 May 2019 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jul 2018 | 25 Jul 2018 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Jul 2017 | 26 Jul 2017 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 28 Jul 2016 | 27 Jul 2016 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Jul 2015 | 29 Jul 2015 | 001-13252 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Aug 2014 | 30 Jul 2014 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 31 Jul 2014 | 30 Jul 2014 | 001-13252 |
| 4 | Open Document | Open Filing | 02 Oct 2013 | 30 Sep 2013 | 001-07151 | |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Aug 2013 | 31 Jul 2013 | 001-13252 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Aug 2013 | 31 Jul 2013 | 001-13252 |
| 4 | Open Document | Open Filing | 02 Jul 2013 | 28 Jun 2013 | 001-07151 | |
| 4 | Open Document | Open Filing | 02 Apr 2013 | 29 Mar 2013 | 001-07151 | |
| 4 | Open Document | Open Filing | 03 Jan 2013 | 31 Dec 2012 | 001-07151 | |
| 4 | Open Document | Open Filing | 02 Oct 2012 | 28 Sep 2012 | 001-07151 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 Jul 2012 | 25 Jul 2012 | 001-13252 |
| 4 | Open Document | Open Filing | 03 Jul 2012 | 29 Jun 2012 | 001-07151 | |
| 4 | Open Document | Open Filing | 03 Apr 2012 | 30 Mar 2012 | 001-07151 | |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 29 Feb 2012 | 27 Feb 2012 | 001-07784 |
| 4 | Open Document | Open Filing | 04 Jan 2012 | 30 Dec 2011 | 001-07151 |