The closest available metric is probably the BEA's PCPI[1], which is $42,315 for WV. So about 30% more, but I think a more fair metric would probably adjust for differences in social entitlements and welfare.

(Per capita for both also doesn't tell us much about distributions, or even sheer numbers: the two states that have lower HDIs than the least developed region of NZ have nearly as many people as all of NZ.)

[1]: https://en.wikipedia.org/wiki/List_of_U.S._states_by_adjuste...