It's difficult to get accurate statistics on how much people drink, as for obvious reasons people tend not to be honest when asked.
Most of the replies on this thread have been people who hardly drink at all, but I whole not saying this reflects society very accurately.
My husband and I are now totally sober, but used to drink too much. We only drank in the evenings, but it was nearly every evening. Never too hung over for work or anything like that - but still too much, and it was having negative effects on both of our lives. But in some ways it's easier to see that now we are sober!
Loads of my friends I suspect either drink every night or most nights. And pretty much every Friday and Saturday they really binge and are hungover the next day. But they consider their drinking to be within the normal range.
I understand why your husband doesn't want to be labelled as having a problem - there is a lot of prejudice out there about it - the idea that everyone who has ever had issues with alcohol is a lifelong alcoholic, and thus a selfish liar who is not to be trusted, is one you hear on this site quite a lot, for example!
But it's actually a very old fashioned way of thinking. Lots of people now are realising that many of us (from all walks of life) struggle with alcohol (or other addictions) at one time or another, and are healthier and happier sober. We don't need to be stigmatised and "othered" into some species of monsters, just because we have drunk too much at one period in our lives! Alcoholic drinks are designed to make people want to keep drinking them - there is no great and secret shame in succumbing to that - SO many do - but you do of course need to try your best to sort it out when you realise you have a problem.
I hope you can encourage and support your husband towards sobriety, OP. He will, as you say, be so much happier and healthier if he makes that choice. I wish you the best of luck with it.