| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 14 May 2021 | 12 May 2021 | 001-04482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 15 May 2020 | 14 May 2020 | 001-04482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2019 | 09 May 2019 | 001-04482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Mar 2019 | 08 Mar 2019 | 001-08606 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 May 2018 | 09 May 2018 | 001-04482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Mar 2018 | 06 Mar 2018 | 001-08606 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 May 2017 | 11 May 2017 | 001-04482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 07 Mar 2017 | 03 Mar 2017 | 001-08606 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 13 May 2016 | 12 May 2016 | 001-04482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 08 Mar 2016 | 04 Mar 2016 | 001-08606 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2016 | 31 Dec 2015 | 001-04482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 26 May 2015 | 21 May 2015 | 001-04482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Mar 2015 | 06 Mar 2015 | 001-08606 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 12 Feb 2015 | 31 Dec 2014 | 001-04482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 27 May 2014 | 22 May 2014 | 001-04482 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | 10 Mar 2014 | 07 Mar 2014 | 001-08606 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | 06 Feb 2014 | 31 Dec 2013 | 001-04482 |