| Country/project | Holland | France | Luxembourg | Sweden | Britain | |
| Holland | Correlation index | 1.0000 |
|
|
|
|
| Significance | 0.0000 |
|
|
|
| |
| France | Correlation index | 0.695* | 1.0000 |
|
|
|
| Significance | 0.0130 | 0.0000 |
|
|
| |
| Luxembourg | Correlation index | 0.3020 | 0.832** | 1.0000 |
|
|
| Significance | 0.1990 | 0.0010 | 0.0000 |
|
| |
| Sweden | Correlation index | 0.811** | 0.4100 | −0.1150 | 1.0000 |
|
| Significance | 0.0020 | 0.1200 | 0.3760 | 0.0000 |
| |
| Britain | Correlation index | 0.649* | 0.4940 | 0.0260 | 0.901** | 1.0000 |
| Significance | 0.0210 | 0.0730 | 0.4710 | 0.0000 | 0.0000 | |