The situation for Norwegian Offshore vessels are not rosy either, despite being mostly top modern and efficient, but also expensive to operate for the Owners(not necessarily for the Charterers)
Presently 106 vessels in layup and that does not include vessels outside the North sea area: http://maritime.no/opplagsregisteret/
Sorry, in Norwegian but Google Translate should suffice to get an understanding.
PS> I tried the translation; “Location in circulation” means “Layup position”. (Nobody should expect perfection)