In January 2018, the seasonally adjusted production index in the construction sector reflected a decrease of 0.5% compared to December 2017. The calendar adjusted production index reflected an increase of 13.8% compared to January 2017.
Results for January 2018 are provisional.
Changes from March 2018
Construction production indices are indices with constant weights over time. These indices are reassigned a new base year every five years. The previously published indices (since 2000) had 2010 as base year. This means that the weights of the different aggregation levels corresponded to values calculated based on the year 2010. These indices were published with reference year=100 in 2010. As of March 2018 (reference month=January 2018), the weights that will be used for the aggregations are values calculated based on the year 2015. The indices will also be published with reference year=100 in 2015.
The weights used for this index are the values added at factor cost from the Structural Business Survey.