What percentage of the universe's mass is contributed by neutrinos?

[Thomasmoscow]

What percentage of the total mass of the universe ( byaronic + dark matter and dark energy) is contributed by the neutrino..?? Maybe by relic neutrinos...most of the time I find 340 relic neutrinos per cm3 in website ...should I take account for the neutrinos produced by all the burning stars... And other sources To find the close result for neutrino mass contribution in the universe ?...

 

[newjerseyrunner]

Less than one percent, neutrinos may outnumber atoms by huge numbers, but they're so tiny that they do not contribute much to the total mass of the universe. By comparison, atomic matter makes up close to 5% of the universe.

Source: http://www.nasa.gov/topics/universe/features/wmap_five.html