I'm working with tech documents and spec lists that often have one footnote applying for several items like:

Item A
Item B (footnote 1)
Item C (footnote 2)
Item D (footnote 1)
Item E (footnote 3)

Instead of having footnote 1 listed twice (which looks very odd and consumes space), it would be awesome to have some slick way to deal with this without the need of working with crossreferences and alike.

I'm aware of adding a superscript 1 for the second appearance but it doesn't automatically counts up when adding a new footnote prior to the automatic footnote.