Apparently, transsexuals and transvestites are waning, and transgender is ascendant. Not that we didn’t know that, but there it is in red green and blue.
I like the way dyke has remained a subcultural word (consistently small percentages over time), while I assume queer went from being used in the “odd or weird” way to the current meaning, dipping in the late 80s/early 90s.
Some explanation for the graphs would be handy, like the sources (Google’s book scan for words). It doesn’t really chart identities, except by writers in books. It’s really a literary identity than a reality identity because it doesn’t distinguish the writer’s definition of the identities. It’s simply the use of the three words, nothing else.