Dear Alex,
Welcome to the forum !
I think the direct answer to yr question is no.
An indirect “average” answer might be based on relative country statistics of certified cases of iso 22000, BRC etc if such exists (unfortunately probably not). Even then, you presumably need a “percentage” based estimator. Per capita ? GDP?
(slightly off-topic) - I also wonder if this thread is analogous to the old question as to whether possession of ISO 9000 improves the quality. The last global average answer I saw to this was seemingly no.
I don’t recall seeing any global attempt to answer this question for
HACCP. Any strict answer should presumably relate to food categories / consumer types, eg the USA meat industry is one of the few attempts to make a direct quantitative correlation, I think?
Regarding yr original statement –
Foods in the U.S., Western Europe, and Japan are in general safer.
Intentionally provocative?

Think rare hamburgers for example.
>> And healthier ????
Rgds / Charles.C
added - some other vaguely related thoughts on this last-mentioned topic are here -
http://www.ifsqn.com...?showtopic=4824