| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 28, 2022 | Feb 27, 2022 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 18, 2022 | Feb 16, 2022 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 19, 2021 | Nov 18, 2021 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 9, 2021 | Nov 8, 2021 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 11, 2021 | May 7, 2021 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 26, 2021 | Feb 24, 2021 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2021 | Feb 21, 2021 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 22, 2021 | Feb 18, 2021 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 19, 2021 | Feb 17, 2021 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 16, 2020 | Nov 12, 2020 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 10, 2020 | Mar 9, 2020 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 25, 2020 | Feb 22, 2020 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 21, 2020 | Feb 19, 2020 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 20, 2019 | Nov 18, 2019 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 1, 2019 | Feb 27, 2019 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 26, 2019 | Feb 24, 2019 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 28, 2018 | Nov 26, 2018 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2018 | Feb 23, 2018 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2018 | Feb 21, 2018 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 6, 2018 | Feb 2, 2018 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 13, 2017 | Nov 10, 2017 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2017 | Feb 24, 2017 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 24, 2017 | Feb 22, 2017 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 15, 2017 | Feb 13, 2017 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2017 | Feb 6, 2017 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 14, 2016 | Nov 10, 2016 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 29, 2016 | Feb 26, 2016 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 26, 2016 | Feb 24, 2016 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2016 | Feb 5, 2016 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 10, 2015 | Nov 6, 2015 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2015 | Feb 25, 2015 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 24, 2015 | Feb 20, 2015 | 001-06028 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Aug 5, 2014 | Aug 1, 2014 | 001-06028 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 5, 2014 | Feb 24, 2014 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 26, 2014 | Feb 24, 2014 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 25, 2014 | Feb 21, 2014 | 001-06028 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 7, 2014 | Feb 5, 2014 | 001-06028 |