Given what the global scientific consensus is (AGW is real, ice is melting, humans are to blame), it is my first impression that your graph and stance is probably crap, but I don't know enough about climate science to make a reasonable argument one way or another (or even interpret the data for that matter).
What's a layperson to do? You can learn basic Python in an afternoon, but basic climatology?
----
Quoting the now-deleted comment for context:
Yep. It's already been debunked multiple times, but they just keep rehashing it to sell newspapers. Here's a trend for those interested in the actual numbers: http://www.climate4you.com/images/NSIDC%20GlobalArcticAntarc...
Source (for those that REALLY still want to believe in climate change): http://www.climate4you.com/SeaIce.htm
Source's source (for those that are just being silly at this point): ftp://sidads.colorado.edu/DATASETS/NOAA/G02135/