What percentage of the c++ 2.7 Standard Library is written in c++ versus a binary compiled language such as C that is called from c++?

[Aleksander]

Hi, I would like to ask you a little problem to ask. Thank you How we do, what percentage of the c++ 2.7 standard library is written in c++ versus a binary compiled language such as c that is called from c++? Please kindly give me your opinion quickly!