The 180 hours a year / 15 hours a month figure certainly rings a bell from the distant past, as far back as the very early eighties - night cross country in the F-4 to get the squadron hours up, whilst minimising fuel burn and not using up Fatigue life...all for the Wing Commander's AFC of course ...umm that reminds me of a song.
Finally what about (for example) your airline crews who on a long haul flight might log 10-15 hours but share between two of them five minutes when the autopilot is not engaged.
To be fair JF some of us do try to manage for more than five minutes without electronic assistance
....old habits and all that.