This neat diagram was brought up on english.SE from wikipedia, based on research by Finkenstaedt, Thomas and Joseph M. Williams describing where words come from.
On the wikipedia page it also states that latin also includes specialized medical terms, which kind of defeats the purpose in regards to giving an impression of word origins. Is there any source that describes the exact same thing, but multiplies each word 'value' by the amount it is used? Or put differently, taking the entire theoretical corpus of English literature and for each word counts it's origin (germanic, latin/french, unknown, etc.), regardless of whether it already got counted it before.