If that's the self discharge rate then the battery would be fully discharged after less than a year on the shelf (given its 190mAh capacity). Coin cells typically have a much longer shelf life than that. I wonder what that figure is, exactly.
This sounds like a job for a lithium thionyl chloride battery.
The guys with the purple LiSoCl2 batteries make ones with up to 40 years of usable life