It's been interesting watching consumption rise with the new technology.I tend to vape different strengths all the time depending on situation and for me at least strength changes how much I vape.
Sitting at home 6mg 4-6ml a day.
When I go out 9mg 3-5ml a day (mix 18mg with 0mg 50/50).
If I'm drinking 12mg 5-7ml a day (a lot of people I know smoke cigarettes so I up the nicotine to curve cravings).
On an average day I'd say 5ml of 6mg.
vaping Subtank mini @ 22w
I used to use a lot less before the subtank though maybe 2-3ml a day.