Quotable source for numbers of embedded vs. desktop CPUs?

Hi all,

could someone point me to a quotable source/book on the numbers of
embedded vs. desktop CPUs out there. I'm looking for a statement along
the lines of "90% of all processors worldwide are used in consumer
electronics and embedded control systems".

I'm also looking (for my thesis) for current, academic books on software
design considerations on (small) embedded systems - drivers,
OS development, efficient software, etc. Any recommendations?

thanks,
Andreas
.

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