| Sample | Don’t Know | None | Weak | Good | Very Good | Exclnt. |
| Public Owners | 0 | 2 | 15 | 7 | 1 | 0 |
| Private Owners | 0 | 7 | 4 | 3 | 1 | 0 |
| PM firms | 0 | 0 | 4 | 10 | 1 | 0 |
| Engineering firms | 0 | 4 | 6 | 4 | 1 | 0 |
| Contractors | 0 | 6 | 19 | 5 | 0 | 0 |
| Total | 0 | 19 | 48 | 29 | 4 | 0 |