Rag,
Those figures are not comparable.
There are more than 4 complaints against Labour MPs over recent years.

The figure 37 is from a dossier about Tory MPs only.
There was no comparable survey to make comparisons with other parties.

No objective comparison has been made by anyone.
There is much more recent research available. Consider that reported to Parliament by Andrea Leadsome which you claimed knowledge of.

I mistakenly thought your 6 month old dossier was the same one.
It is not and your old one has been forgotten by everyone.