Ownership History
| BENSON & HENDERSON ENTP LLC | $0 | | 1168/111 | 99 | 01/30/2009 |
| BENSON & HENDERSON ENTP LLC ETAL | $0 | | 1149/334 | 99 | 08/18/2008 |
| BENSON & HENDERSON ENTP LLC | $0 | | 1062/283 | 99 | 01/24/2007 |
| BENSON & HENDERSON ENTERPRISE LLC | $0 | | 1005/345 | 99 | 02/14/2006 |
| BENSON & HENDERSON ETPR LLC ETAL | $0 | | 0998/339 | 99 | 12/30/2005 |