[ToValueFunfetti]

Without a person-nights denominator, 22 US CO deaths/14 years is impossible to compare to 19 global CO deaths/10 years. Of course, Airbnb's 0 US CO deaths/(10 years * X person-nights) is less than 22 deaths/(14 years * Y person-nights) for any values of X and Y > 0, but if the ratio was less than 1X:100Y, say, the 0 wouldn't be precise enough to get to a comparison.