| Base and line maintenance: | ●●●●●●●●●● |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● |
| Line maintenance: | ●●●●●●●●●● |
| ●●●●●●●●●● |
| Base and line maintenance: | ●●●●●●●●●● |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● |
| Line maintenance: | ●●●●●●●●●● |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● | |
| ●●●●●●●●●● |
●●●●●●●●●●
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●● | ●●●●●●● |
| ●●●●●●●●●● | ●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●● | ●●● |
| ●●●●●●●●●● | ●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●●●●●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●●●●●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●●●●●●●● | ●●●●●●●●●● |
| ●●●●●●●●●● | ●●●●●●●●●● | ●●●●●●● |