Monthly national punctuality weighted

The weighted metric take into account the amount of passengers on trains: the delay of a crowded train on peak hour weighs more than this of a sparsely populated train during off-peak hours.
The punctuality metric represents the proportion of trains that , over the course of a month, arrived with a maximum delay of 5 minutes and 59 seconds at their destination or - for the trains travelling through Brussel's North-South junction, upon arrival at the first station of the junction on their path.