It’s cumulative over the 5 seasons. We have 5.25 based on getting 5 points last year and 0.25 for our participation in Q1 the year before. Aberdeen have picked up a point every season, except last season where they picked up 1.5. So they are on 5.5 points.
Last season was the first year UEFA had slightly different coefficient rules. You now get more points based on which round of qualifying you get to. So Aberdeen got 1.5 for getting to Q2, the year before they’d have only gotten 0.5 for that.
A similar result for us this year would see us jump up 100 places - where teams like Alkmaar and Rosenberg currently sit. Simply matching Aberdeen’s performance would see us leapfrog them.
Here’s how you get points: https://kassiesa.home.xs4all.nl/bert/uefa/calc.html
Here’s next season’s rankings: https://kassiesa.home.xs4all.nl/bert/uefa/data/method5/trank2019.html