You can view your statistics in two ways.
1. Via FTP.
The website statistics are in the /stats directory of your domain. By downloading these you can view them on your own PC.
Log in via FTP:
ftp.yourdomainname.nl
Username_ftp
Password: xxx
2. View your statistics online. Place behind your domain name/stats (http://www.uwdomeinnaam.nl/stats), there you will find the online statistics for your website
Username: admin
Password: xxx
The password is the universal password of your package, provided you change it yourself via the
ISPConfig panel

Statistics explained http://www.webalizer.org/webalizer_help.html