In their heyday in the Golden Age of Piracy, how significant a menace were pirates? I.e. what percentage of government revenues for England, France, Spain, Portugal or the Netherlands would have been lost to piracy? Were they ever a financially existential threat to colonial regions?
While you wait for answers, you might be interested in reading some previous threads from the FAQ section on "The Golden Age of Piracy, Life of a Pirate and Other Related Topics":