My Automatic Mazda 3 (petrol).
Hope you don't mind the metric measures.
You can see the gear changes kick in around 15kph and 35 kph.
Above 75kph drag starts kicking in and efficiency drops.
Data source is from over 500 trips with my OBD2 adapter. - it logs every two seconds.
(I don't drive on the highway much so the data above 80kph is a bit thinner).