Injektor: Positive or Negative Values?

Hello to all diesel enthusiasts,

question about the values of the injectors, must they be negative or positive! I haven't been able to find anything about it anywhere, could you help me further?

A6 2.7 BPP Engine 1/2008
Measurement block
072 to 1. 10ms, to 2. 2ms, to 3. 6ms,
073 to 1. 10ms, to 2. 0ms, to 3. 2ms,
074 to 1. 16ms, to 2. 8ms, to 3. 8ms,
075 to 1. 6ms, to 2. 4ms, to 3. 8ms,
076 to 1. 14ms, to 2. 4ms, to 3. 6ms,
o77 to 1. 4ms, to 2. 0ms, to 3. 6ms,

These are the values displayed to me when the engine is cold, with the ignition on, only.

Question: Are the values good, or bad? Burnt or leaking?

While some believe that a minus sign should be added before every number, others feel that everything is already in the right place.

I would appreciate any news or comments.