| Country/project | Holland | France | Luxembourg | Sweden | Britain | |
| Holland | Correlation index | 1.0000 |
|
|
|
|
| Significance | 0.0000 |
|
|
|
| |
| France | Correlation index | 0.930** | 1.0000 |
|
|
|
| Significance | 0.0000 | 0.0000 |
|
|
| |
| Luxemburg | Correlation index | 0.915** | 0.972** | 1.0000 |
|
|
| Significance | 0.0000 | 0.0000 | 0.0000 |
|
| |
| Sweden | Correlation index | 0.809** | 0.919** | 0.913** | 1.0000 |
|
| Significance | 0.0000 | 0.0000 | 0.0000 | 0.0000 |
| |
| Britain | Correlation index | 0.707** | 0.874** | 0.875** | 0.945** | 1.0000 |
| Significance | 0.0010 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | |