It would be great if that line chart with the wait times at Heathrow could be extended with the number of passengers who land, and the number of employees worki

It would be great if that line chart with the wait times at Heathrow could be extended with the number of passengers who land, and the number of employees working border services. I would like to see if there is a correlation between the number of employees and the wait time, and if passenger numbers have increased or remained steady.