I measure my productivity in a way akin to the ratio of time spent adding features added + fixing other people's bugs over the time fixing bugs I create and rew

I measure my productivity in a way akin to the ratio of time spent adding features added + fixing other people's bugs over the time fixing bugs I create and rewriting my own code. Granted I am an "engineer" in a small company, not just a programmer, which I guess means I do things like write requirements, evaluate new platforms etc. IE lots of things not directly tied to implementing new features or improving existing ones. Not sure how that factors in.