QTR-Quadtone RIP

For the Curve Creator tool:

When I look at the lineariztion tab for a paper (for example, Epson
Enhance Matte Neutral) I assume I'm seeing a numeric version of
something similar to Curves in Photoshop. 

I see steps in 5% increments, within a possible range from black
(100%) to whiten (0%). 

And I'm assuming that the numbers are indicating where a particular
tone will print lighter (such as where the first box is 96.86, instead
of what I think the 'default' should be which is 100), or where it
will print darker (such as the last box being 16.15 instead of 0). 

Am I interpreting these linearization numbers correctly? That they
tell the printer to print certain areas of the tonal range lighter or
darker (or the same)?  And that 100 is black or darkest, and 0 is
white or lightest? 

Thanks, David.