Also, be careful not to use January sales as an unbiased indicator of demand because supply may have been constrained. The Mint may have started shipping 2014 coins later in January this year than last. And, allocations of the new coins may have been smaller at the beginning of this year than in previous years.
This blogger seems to know the US coin business: http://news.coinupdate.com/us-mint-gold-and-silver-bullion-sales-fall-short-of-prior-year-3135/
U.S. Mint Gold-Coin Sales Jump 63% in January; Silver Triples