The cost of living fell by 5% last year according to the latest inflation figures from the CSO.
Prices fell by half a percent last month alone.
This compares to a decrease of 1.2% recorded in December of last year.
The most notable changes in the year were decreases in housing, water, electricity, gas & tther fuels (-21.2%), clothing and footwear (-14.7%), food and non-alcoholic beverages (-8.1%), and furnishings, household equipment and routine household maintenance (-4.8%).
There were increases in education (+11.3%), miscellaneous goods and services (+5.4%), health (+2.5%), transport (+2.1%) and alcoholic beverages and tobacco (+1.2%).