[simonblack]

Gut feeling: 10-15%.

That shopping trolley gets emptier and more expensive by the week.

Some items that I have actually noticed increase in price, have been around 20%. But that was likely just because the increase was a glaring example.

[jstx1]

I think that OP's question is about increases in salary due to different cost of living, and you're responding about increases in cost of living.