How many of the friends in your circle have you never exchanged a single word with?

at present i can think of only one or two that i've never spoken to and am unsure about keeping on my list but i do have around 30+ friends who i seldom speak with. it's not deliberate, i'm sure we are all just busy in our real lives for the most part. i added my circle friends with care though, i don't add people that don't match at least a few of my experiences or are too obsessed with sex.