| Sample | Don’t Know | No | Yes |
| Public Owners | 1 | 24 | 0 |
| Private Owners | 4 | 11 | 0 |
| PM firms | 0 | 15 | 0 |
| Engineering firms | 0 | 15 | 0 |
| Contractors | 3 | 26 | 1 |
| Total | 8 | 91 | 1 |