Lecithin content in various oils?

Question

How much lecithin is in various plant oils like olive, sunflower, soybean, canola, safflower, avocado, palm, coconut, etc.? Or in animal fats?

^{cf. R. W. Bernard, Science Discovers the Physiological Value of Continence (Mokelumne Hill, Calif.: Health Research, 1957), which mentions lecithin 134×!}