Like the title says:
PS3 sales Multiply four times (in the Benelux) with release of PS3 Slim
Sadly their are no numbers (yet).
Source: Just type Benelux PS3 slim and you will find more than ten sources (with a big chance that they are in Dutch/french).
And oh yeah Benelux = Belgium/Netherlands/Luxembourgh if some were wondering what Benelux is.