While I do not know the percentage for sure, take into account what I know.How do you know, were you there? If they lie about anything else, why should the say the truth about this? just asking
Three of my family members are triple jabbed, way before rest of the world. Aside from the in-the-closet liberal brother, my parents are JWs. Neither listen to ANY logic. It's astonishing what my JW father believes in. The only thing blatant enough that WTBS can do to make him doubt is if they start promoting homosexuals, and other very fundamental teachings(name of God, Trinity, hellfire, etc).
My father has said that 10 or so people have passed away in the congregation of about ~130 people.
Remember also that Bethel is basically the indoctrination centre numero uno for JWs. The most ardent of them go there. Is it really hard to believe the 99% number? The JWs don't just believe Bethel is a centre of a very well-run organization(therefore, thus reason to be proud of), they believe Bethel is the centre of a very well-run organization and because it is run by Christ Jesus himself. If rank and file believe almost every word of the Governing Body, then a way to go up in the such revered rank is by going to Bethel.
I'm surprised that 1% didn't get jabbed.