At the Swedish Trafikverket website, I can find current times for trains by train numbers. Like this, I can tell whether a train is running late. However, they only show today, perhaps yesterday and tomorrow for overnight trains. Swedish SJ publish reliability statistics, but only by month and train category. For planning purposes ("do I take the bet for the train to be less than 1 hour late"), I'd be quite interested in looking through the exact delays for a specific train number for the past couple of weeks.
Is there any (probably unofficial) website archiving the information available on a daily basis at Trafikverket, so that users can find (recent) historical delay information for a specific train number?