Required ASAP...

Breaking these into 3 categories by unit price $10K - <$100K, $100K -
$1.5M & > $1.5M & by markets - earthmoving, mining.
How many pieces of earthmoving/mining plant/machinery are in use in
the world today?  
What is the market size for these?  
What is the market share of the major players in original equipment (Who are
they)?  
What is the size of the maintenance market for these?  
What is the market share of the major players (Who are they)?.  
What is the mean age of plant/machinery.

I am particularly interested in Caterpillar, their dealerships and competitors.
Information by dealership would constitute an excellent reply.