> you would divide the number of people who have died due to a shark attack each year (on average three to four each year based on recent data) by the populatio

> you would divide the number of people who have died due to a shark attack each year (on average three to four each year based on recent data) by the population of Australia This method is meaningless, as it assumes the risk of dying by shark attack is constant regardless of your behavior (e.g., daily swim in chummed waters vs never entering the water). The wikipedia article does a better job of micromort-per-unit-of-exposure. https://en.wikipedia.org/wiki/Micromort https://en.wikipedia.org/wiki/Micromort e.g., Travelling 17 miles (27 km) by walking (accident) = 1 micromort But it still doesn't account for differing risk levels, like walking on an indoor track vs walking in city traffic. And it doesn't include shark attacks.