| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 17 Mar 2023 | 15 Mar 2023 | 000-21272 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Feb 2023 | 02 Feb 2023 | 000-21272 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Nov 2022 | 11 Nov 2022 | 000-21272 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 08 Aug 2022 | 04 Aug 2022 | 000-21272 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 17 Mar 2022 | 15 Mar 2022 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 19 Apr 2021 | 15 Apr 2021 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 10 Feb 2021 | 08 Feb 2021 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 11 May 2020 | 08 May 2020 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 18 Mar 2020 | 16 Mar 2020 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 13 Nov 2019 | 11 Nov 2019 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 19 Mar 2019 | 15 Mar 2019 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 22 Feb 2019 | 20 Feb 2019 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 16 Mar 2018 | 15 Mar 2018 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 17 Mar 2017 | 15 Mar 2017 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 21 Feb 2017 | 16 Feb 2017 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 28 Nov 2016 | 23 Nov 2016 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 23 Nov 2016 | 21 Nov 2016 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 31 Aug 2016 | 29 Aug 2016 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 05 May 2016 | 03 May 2016 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 17 Mar 2016 | 15 Mar 2016 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 12 Nov 2015 | 10 Nov 2015 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 18 Mar 2015 | 16 Mar 2015 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 15 May 2014 | 13 May 2014 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 19 Mar 2014 | 17 Mar 2014 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 14 Feb 2014 | 12 Feb 2014 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 02 Aug 2013 | 31 Jul 2013 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 08 May 2013 | 06 May 2013 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 26 Apr 2013 | 24 Apr 2013 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 19 Mar 2013 | 15 Mar 2013 | 000-21272 |
| 4 | Open Document | Open Filing | 4 | 16 Mar 2012 | 15 Mar 2012 | 000-21272 |