The output of the sector's biggest companies, with more than 250 people on payroll, increased 4.9% last year. Those companies' share of total construction sector output climbed from 8.9% to 10.3%.

The output of companies with a headcount of 50-249 fell 12.8%, while that of companies with 20-49 employees dropped 13.4%. The two groups of companies accounted for 21.1% and 13%, respectively, of total output.

Companies with fewer than 10 people on payroll, making up 43.3% of total construction sector output, registered an output drop of 6.2%.