A well regarded pharmacology textbook states that an average corona contains two lethal doses of nicotine. So what?
In any specific variety of tobacco, the nicotine level varies from lower to higher as you work up the stalk. So even the ARS-GRIN nicotine analysis numbers (available for only some varieties) are not particularly useful, even in a comparative sense. Also, the chemical concentration of nicotine in the tobacco is only indirectly related to the quantity of nicotine that your body absorbs. And the pH of the smoke will determine whether or not nicotine in the smoke is absorbed to an appreciable extent by the mucosal membranes in your nose, mouth and throat. (smoke of flue-cured is not; smoke of cigar leaf is) Topped plants produce more nicotine than plants that have not been topped. Increased fertilizer and increased planting space results in higher nicotine.
Don's leaf is the very same leaf found in premium cigars, derived from the same supply chain. Seco is lower in nicotine than viso, which is lower than ligero. How you go about smoking a cigar (your very own puffing pattern) influences the percentage of the nicotine from the smoke that will waft away in the side stream vs be drawn into your mouth.
Lab analysis of nicotine in cigar leaf is somewhat expensive, and if performed properly, would result in a statistical scatterplot for each bale of leaf.
Short answer: the numbers would not be meaningful.
Bob