I believe the answer is,
The life expectancy of the average worker.
Let me know if this helped! :)
The Treaty of Trianon in 1920... in the aftermath of WWI, was extremely harsh on Hungary and unjustifiably one-sided. The resulting "treaty" lost Hungary an unprecedented 2/3 of her territory, and 1/2 of her total population or 1/3 of her Hungarian-speaking population.
Conditions on slave ships caused many slaves to die. The conditions were absolutely inhumane, slaves were stacked one on top of the other or very closely together, were given rotten food or no food and had to endure very long journeys, which increased sickness.