Sweden. You pay around $12 for the basic coverage which covers 80% of your salary up to a cap of around $2500 a month, for 250 working days. My union membership, which costs approximately $25 per month, then includes an additional coverage for if you go over the cap of $2500 a month for the basic coverage. These combined then cover you for income up to around $4500 a month. It's also possible to get additional coverage on top of that to cover incomes above this amount through the union, again for around $12 a month.

I've simplified the terms greatly, so in practice they are a bit worse - in particular, the compensation amounts get lower after a certain amount of days spent unemployed - but the general idea holds. To qualify, you need to have been employed already for a year, and you are required to look for work as a condition to get payouts on the insurance. You lose the right to payouts if you decline an appropriate job offer.