Electrical materials had the second highest weight of all the seven major construction material commodity groups in the CMRPI.
Meanwhile, month-on-month growth in the CMRPI slowed to 0.2 percent in January 2019.
The CMRPI is a variant of the General Retail Price Index (GRPI) that measures the changes in the average retail prices of construction materials.
The highest growth of retail prices was recorded in January and February 2017 at 2.2 percent, while the lowest was in June when the CMRPI grew by only 0.9 percent.
The CMRPI tracks the price of 102 commodities classified into seven major groups-carpentry, electrical, masonry, painting and related compounds, plumbing, tinsmithry and miscellaneous construction materials.
Only carpentry, as well as painting and other related compounds, posted slower rate of increases in CMRPI at 0.4 percent and 1.1 percent in 2017, from 1.5 percent and 1.3 percent, respectively.
Last December PSA data showed the CMRPI posted a 1.7-percent growth, the same rate recorded in the previous month.
Data also showed the month-on-month increase of the CMRPI in the NCR slowed to 0.1 percent in December 2017.