Road stud numbers replaced annually

I would very much appreciate information for the number of Road Studs that are replaced Annually in the UK within your Region?

Devon County Council can identify from the maintenance budget that in this financial year we have or will replaced 17,893 units.

For clarification this will not include new schemes, housing developments and preventative maintenance schemes.

Further, this does not include roads maintained by Highways England and therefore in Devon the A38 Expressway, M5, A30 to Cornwall, A30 to Honiton , A35 to Dorchester and A303 to Ilminster.