This is such a small percentage compared to the length of time in which dinosaurs were around, that my calculator rounded it off to 0. Science is a strange business. When we landed on the moon in 1969, the world of Islam believed it to a sacred act, treated the astronauts as holy men, and considered the moon rocks as holy relics. The island of Bali, on the other hand, lodged a protest at the United Nations against the US for desecrating a sacred place. Still others believed that the event was staged and that the US made the moon landing in a Hollywood studio.
Medical science is an even stranger business.
Sir Arthur Conan Doyle based the character of Sherlock Holmes on a physician named Joseph Bell whose supposed powers of deduction allowed him to pronounce diagnoses as a result of a cursory glance at his patient and prior to his physical examination. Medical science by the admission of its own practitioners, is pushed along and praised by its own Zeitgeist. I, myself, as a scientist, suffer from the same dilemma. But it's not our fault because every age has to face the very same quandary. We have, as our perimeters, the limits of the body of knowledge which is available to us.