eddie_420,
I recommend you send in a single piece of evidence that proves your one year residency. What are some examples? College/school transcripts that cover a broad range of time, employment reference letter indicating when you were hired would cover a broad range of time, and a lease which indicates that date you inhabited the premises.
Although I don't agree with the statement "Do not send USCIS anything they didn't ask for;" I do agree with the idea of not sending too much evidence. So just attach one document establishing proof and you should be good to go. For my application, I attached my college transcript.
Hope this helps.