I'm 40 years old who is a muslim. I spent half of my life living in a muslim/arab country and the other hald in the west. Here is what I've seen:
1- Of all the people I know where I grew up in the arab country, probably only 2-3 drunk. This does correlate with the data [1]. But those 2-3 people did drink heavily.
2- Alcohol in the arab world has a different meaning. In the arab world it would be more like: "hey there is this poison, let's drink to forget about my issues and lets do that in hiding". While in the western world, it's more "let's meet for a drink and have a little fun".
3- There is no drinking culture in the arab world. This is because there are limited number of bars/pubs and people do not consume it openly. Not in weddings, gatherings or barbeques. A minority will come already drunk to a wedding (see point 1)
4- Islam is big on forbiding Alcohol. Not only that, but there is this idea that alcohol can stay up to 40 days in your body (never verfied this claim). Hence why a lot of people who actually drink, stop drinking 40 days before Ramadan starts. While a lot of muslims don't pray, the majority do fast and hold onto Ramadan. Bars and Pubs actually close a month before Ramadan too. The drinkers I knew, did actually follow this rule.
5- Yes, I know, you probably knew that guy in high school who was an arab and a heavy drinker. And that is correct. But the data and what I've seen in arab countries correlate more with point 1 above. Alcohol is so frowned upon, that even people who like to drink don't want to show it to their kids or neighbors. It's rare to have an arab family buy alcohol and put it in the fridge. Alcohol is also not available in supermarkets or anywhere except in bars. I lived in >1mil city and we had 3 bars.
6- There is a weird association in arab countries between Alcohol and Violance/Agression. WHich is some time true.
I never understood this obssession with Alcohol. Because I just wasn't used to it. It's so bizzare that I had to explain myself all the time on why I'm not drinking.