| Year | 2012 | 2016 | 2020 |
| Density | 0.2091 | 0.3545 | 0.4545 |
| Connectedess | 1.0000 | 1.0000 | 1.0000 |
| Hierarchy | 0.0000 | 0.3333 | 0.0000 |
| Efficiency | 0.8889 | 0.7111 | 0.6222 |
| LUB | 1.0000 | 0.9778 | 1.0000 |