.... Given our numbers here on SN (and CF), there is no reason we canít come up with good data on who is paying what. But it will take people to step up with their information.
I'm afraid there is reason to doubt the data, as I was trying to explain. You only ask for value of the hull and total premium. You won't know the particulars of what risks are covered or how that value is agreed to be paid (replace, repair or agreed), which can have significant impact on premium. Nor do you ask about liability coverage, limits or how that premium breaks down in the total.
Hull coverage cost will obviously vary with the value of the hull, its condition (which the survey also doesn't parse), its age, its complexity, etc. Liability will start to vary with the experience of the crew, because injuring another person or property or the environment isn't as directly correlated to the size of your own boat. On the other hand, the more people you can carry, the higher the possiblity you hurt someone aboard.
In the end, the rule of thumb I've experienced and heard of (here) is around 1% of hull value as an average for average coverage and average experience for both hull and liability. Maybe a bit more, if it's you're first boat like it, or a bit less if your more experienced. Much less is often much less coverage beneath the surface.
As an anecdote, my policy has stated value, which means if I lost it, they just pay me what we mutually agreed she's worth. It's still what I paid for her about 8 years ago and I know she's declined in value. My premium is a bit less than 1% of what I think she's really worth, but more like 2/3rds of a percent of what they have agreed to pay. Complex data, the survey can't sort out.
Hope that helps.