Zcashd on Ubuntu 16.04 - Excessive network traffic?

I am running version 1.0.14 of the daemon on Ubuntu 16.04 on mainnet. I am not mining.

When I let it stabilize for a few days, I can see it generating a constant stream of traffic averaging about 1.75 MB (megabytes, not megabits) per second outgoing. It almost never drops below 800 KB and sometimes peaks above 3 MB. The incoming traffic is only about 30 KB per second. getinfo usually reports around 80-90 connections.

Is this typical behavior? Or is the traffic unusually high