While this chart has some room for change, there is enough data across broadcast networks, streaming platforms, and cable (both premium and basic) to see trends and draw conclusions.
On this point of proportion, the statistics do back up those who cry foul on television killing off too many queer women. Unless we’re talking about Orange Is the New Black, shows aren’t likely to have more than one or two queer women characters recurring throughout a season; that certainly doesn’t hold true for straight white men, who still dominate cast breakdowns. So if this graph were to reflect the actual ratio of straight white male characters to queer women characters, that difference would almost definitely be far greater. A full 10 percent of deaths being queer women is astonishing given how few of them recur on shows in general.