China’s producer price index (PPI) fell 1.4% year on year in December, data from the National Bureau of Statistics (NBS) showed on Thursday.PPI, which measures inflation at the wholesale level, declined for 22 consecutive months year-on-year in December, but it was unchanged from that in November, according to China’s (Xinhua) News Agency.Annualized PPI for 2013 fell 1.9% year on year, the NBS data showed. This is compared to a 1.7% drop in 2012.Data released on Thursday by the bureau also showed a 2.6% inflation in 2013, and a 2.5% inflation in December.