What percentage of Muslims are radical jihadists?

What do you think about the assertion that only a tiny percentage of muslims are radicalized?

According to political pundit Ben Shapiro, “We’re above 800 million Muslims who are radicalised – more than half the Muslims on earth. That’s not a minority… the myth of the tiny radical Muslim minority is just that: it’s a myth.

That’s a lot of people who, at worst, would either be willing to behead you or at best be happy if you were beheaded.

what percentage of muslims are radical?