What is your definition of IMC?
I've bimbled along at 60 to 80 kts in 5000m viz quite happily, but wouldn't be if I was doing 250kts.
From memory;
1) Aztec over the North Sea at night hit by intercepting Betty Windsor Flying Club machine. Damage to wing tip only.
2) Aerial photo Cessna hit whilst circling by Jag? on NavEx over Wales. All dead.
Have you factored in the Quad rule. Has that affected the results?
I may have had some very near misses in IMC OCAS but then how would I know?
Sir George Cayley