What percentage of power cable is actually recycled at the end of its useful life?

The conventional wisdom says that 100% of underground power cable is recycled, because the scrap value of the metal is simply too high to leave the metal in the ground.

Is this right? I would expect this to be true in general, but as with all rules, there must be exceptions. E.g.

• uncertainty of the trajectory of cable, especially if it dates back to the 50s or 60s.
• it may be impossible to impractical to extract buried cable in urban environments. Also, it may not be economical to do so for LV and MV cable.
• in the past, when commodity prices and environmental concerns were lower, a lot of retired cable may be left in the ground.

In short, I would expect:

• recycling rates to be higher now than in the past, driven by today's commodity prices, environmental concerns and modern cable management.
• recycling rates for HV cable to be higher than for MV and LV (because of relatively higher metal content)
• recycling rates to be higher in rural settings compared to the urban environment (though there may not be much cable in rural areas)
• recycling rates to be higher for larger distribution utilities than for smaller ones (the latter not being organised for asset management).

Does this make sense? Thanks for input on recycling practices, rates of recycling for HV - MV - LV, scrap values, organisation of the recycling chain, ...