They will certainly be below EMA this year and I would therefore imagine NCL as well.
Around 70 departures a day at EMA compared to about 50 in LPL for nearly all of the summer is probably the biggest gap I've seen between these two airports. They both have similar sized aircraft and load factors so EMA will have far more passenger during the summer.
EMA however does have quieter winter seasons than LPL since it's more leisure based, but certainly won't be so bad that annual passenger numbers will remian below LPL.
I think EMA and NCL will be 10th and 11th largest in the UK in 2013 (still not sure which way round as it looks neck and neck to me, my bet would be NCL 10th, EMA 11th) with LPL 12th and then probably BFS in 13th.