It looks trimmed along the bottom.
Maybe or maybe not. I've seen plenty of 37 notes like yours (front un-centered) with the back well centred. I believe the best way to tell whether it has been trimmed is to take another note (preferably with same prefix of the SN) and see how it matches or measures up (although this is not definitive either since there may be small variation from one note to the other). The better the width matches the less likely there's been a trim to the bottom.
Update:
Sorry, I just took a 2nd look and now I see how the border does taper a little upwards on each side which does look suspicious. If you match your note with another note this uneven cut might jump out at you quite dramatically.
I also doubt the note would be AU or UNC since there appears to have been minor mishandling or small, very fine wrinkles which appear to have been flattened out. You can tell if you hold your note up to a light source and look at the back paper where the serial numbers were printed to see whether there is any embossing or slight indentations where the numbers were printed. I may be wrong because I'm only going by your scan- but when I look at the image- it appears as if the note is flattened with no natural waves, ripples, embossing. This suggests the note was pressed to appear to be in a higher grade so it would likely be EF if that were the case.