That seems like a lot; with FastMail I get basically 0. The last time this happened was years ago.

I do get the very occasional spam, maybe 5 messages/month or so. Most of them are from marketing agencies that want to "collaborate" on my website or some such and have a spam score of 0 or close to it, and arguably isn't "spam" in the same way as "grow a bigger dick!"-spam is. I doubt gmail would catch those too.