Comparison of 6 drops until fail

Here are the curves of 6 drops of an old semistatic rope.
Drop test according to the standard. 2 meters with 100 kg. Repeated until fail.
The rope failed in the 6th drop.

I tried to scale it and adapt it so it is a bit comparable.

The energy is always the same (in the first 5 drops). The peak is increasing as the elasticity plus friction in the knot goes down.

In the 6th drop the peak reached the breaking load of the rope. Some of the energy "landed on the ground"

Here is another rope: 5 falls, no fail. Similar pattern.