I am trying to establish a rate of economic inflation of prosthetics
for below knee (aka transtibial) amputees.  I'm interested in data
from the past 20 years, to make estimates for the next 20 years.  The
more specific the data, the better.  If given the choice of prosthesis
to track, I'm interested in total surface bearing socket, endoskeletal
prosthesis, with a Flexfoot or equivilant.  If patient demographics
are available we are looking for high activity 30-50 year old male.