Sales data for the number of computers
on the market versus time.

Sample data file, CurveExpert 1.0

0.001000        50000.000000
10.000000       35000.000000
20.000000       31000.000000
30.000000       20000.000000
40.000000       19000.000000
50.000000       12050.000000
60.000000       11000.000000