| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 20 Aug 2021 | 19 Aug 2021 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jun 2021 | 01 Jun 2021 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 03 Jun 2020 | 01 Jun 2020 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jun 2019 | 03 Jun 2019 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jun 2018 | 01 Jun 2018 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 09 Mar 2018 | 27 Feb 2018 | 001-03548 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jan 2018 | 31 Dec 2017 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 01 Jun 2017 | 01 Jun 2017 | 001-03548 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Jan 2017 | 31 Dec 2016 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jun 2016 | 01 Jun 2016 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 02 Jun 2015 | 01 Jun 2015 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 Feb 2015 | 23 Feb 2015 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 25 Nov 2014 | 10 Nov 2014 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jun 2014 | 02 Jun 2014 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jun 2013 | 03 Jun 2013 | 001-03548 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 04 Jun 2012 | 01 Jun 2012 | 001-03548 |