Working byte values and convert it to numeric

Question

I have some values like this one:

b\'11.9905 ; NAN ; NAN\\r\\n929.335 ; 1091.91 ; 0\\r\\n0 ; 851.954 ; NAN\\r\\n0 ; 0 ; 0\\r\\n0 ; 0\\r\\n11.9838 ; NAN ; NAN\