How have the database numbers changed in a year?

Last year I did a quick text search for "nitrile hydratase" as a search term under proteins on the NCBI website. This gave me 2869, of which 1042 were RefSeq data. Today when I checked there are 3573 (+25%), of which 1369 (+31%) were RefSeq.
No new PDB files have been deposited of nitrile hydratases since March 2011 which was the NHase from Pseudomonas putida.