This is rather strange.
I heard, 8, 10 and 12 piercingly clearly. However, I hear nothing from 14 to 17, then I can hear 18 a bit, then not 19, then I can hear 20 to 22.
I've had tinnitus (ringing in ears) since my earliest memories around the age of 3 or 4 years old, so I imagine that's the cause behind this.