I dont think harvesting actually makes very much money at all for the country
The figures I have for FC for 2010 are (in £ millions)
Expenditure :
Harvesting and haulage 41.2
Recreation, etc 56.0
Other 58.1
Income :
Timber 77.4
Recreation, etc 18.7
Other 23.0
So income from harvesting supports both management costs and expenditure on recreation.
Harvesting and thinning are also necessary for managing the forestry, particularly where spruce plantations are concerned.