Is it possible to see the improvements of coverage over time?

Hi, 

I really like dotCover, and I keep improving my coverage. However, I sometimes wonder how much I have improved my coverage since last time. I don't remember. Then, I need to open my previous code version, rerun the coverage test, and compare. It's not really efficient. 

I was wondering if dotCover has a feature that I may be missing that shows the progress of your overall coverage or even function-specific coverage over time. 

Thanks,

Eyal