What does 'more days than not' mean in this small sentence?

Question

For the past couple of years, have you been bothered by depressed mood, most of the day, more days than not?

Answer 1

The questioner is asking you, are you(Have you been) depressed more days than you have not been depressed.

Answer 2

In otherwords, if a week is 7 days long, were you bothered at least 4 out of the 7 days...

If you tallied up all the days depressed and not in "the past couple of years" would there be more depressed days than non-depressed days?

Answer 3

Has felt depressed more than 50% of the time over the past couple of years.