| Sample | Don’t Know | No | Yes |
| Public Owners | 3 | 19 | 3 |
| Private Owners | 8 | 5 | 2 |
| PM firms | 0 | 0 | 15 |
| Engineering firms | 5 | 4 | 6 |
| Contractors | 8 | 13 | 9 |
| Total | 24 | 41 | 35 |