I want to know the answer to the following question:
What percentage of US drugs are derived from plants, animals, and micro-organisms?
All the background I'm provided with is that "A significant proportion of drugs are derived, directly or indirectly, from biological sources: at least 50% of the pharmaceutical compounds on the US market are derived from plants, animals, and micro-organisms, while about 80% of the world population depends on medicines from nature (used in either modern or traditional medical practice) for primary healthcare.". Is that enough to answer the question?