| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | Dec 30, 2021 | Dec 20, 2021 | 001-15877 | |
| 4 | Open Document | Open Filing | May 10, 2021 | Apr 30, 2021 | 001-15877 | |
| 4 | Open Document | Open Filing | Dec 28, 2020 | Dec 21, 2020 | 001-15877 | |
| 4 | Open Document | Open Filing | Dec 8, 2020 | Dec 7, 2020 | 001-15877 | |
| 4 | Open Document | Open Filing | Dec 17, 2019 | Dec 16, 2019 | 001-15877 | |
| 4 | Open Document | Open Filing | Dec 19, 2018 | Dec 17, 2018 | 001-15877 | |
| 4 | Open Document | Open Filing | Dec 22, 2017 | Dec 18, 2017 | 001-15877 | |
| 4 | Open Document | Open Filing | Jun 7, 2017 | Jun 5, 2017 | 001-15877 | |
| 4 | Open Document | Open Filing | Dec 21, 2016 | Dec 19, 2016 | 001-15877 | |
| 4 | Open Document | Open Filing | May 11, 2016 | May 11, 2016 | 001-15877 | |
| 4 | Open Document | Open Filing | Dec 17, 2015 | Dec 15, 2015 | 001-15877 | |
| 4 | Open Document | Open Filing | May 18, 2015 | May 18, 2015 | 001-15877 | |
| 4 | Open Document | Open Filing | Dec 23, 2014 | Nov 6, 2014 | 001-15877 | |
| 4 | Open Document | Open Filing | Dec 23, 2014 | Dec 22, 2014 | 001-15877 | |
| 4 | Open Document | Open Filing | Apr 24, 2014 | Apr 14, 2014 | 001-15877 | |
| 4 | Open Document | Open Filing | Feb 5, 2014 | Feb 5, 2014 | 001-15877 | |
| 4/A | Open Document | Open Filing | Feb 3, 2014 | Dec 30, 2011 | 001-15877 | |
| 4/A | Open Document | Open Filing | Feb 3, 2014 | Dec 17, 2012 | 001-15877 | |
| 5 | Open Document | Open Filing | Feb 3, 2014 | Dec 31, 2013 | 001-15877 | |
| 5/A | Open Document | Open Filing | Feb 3, 2014 | Dec 31, 2006 | 001-15877 | |
| 5/A | Open Document | Open Filing | Feb 3, 2014 | Dec 31, 2008 | 001-15877 | |
| 5/A | Open Document | Open Filing | Feb 3, 2014 | Dec 31, 2009 | 001-15877 | |
| 5/A | Open Document | Open Filing | Feb 3, 2014 | Dec 31, 2007 | 001-15877 | |
| 5/A | Open Document | Open Filing | Feb 3, 2014 | Dec 31, 2010 | 001-15877 |