Validate container weight distribution of MacGregor

[1kastner]

At https://www.erneuerbar-mobil.de/sites/default/files/2020-01/Abschlussbericht_16EM1004_final.pdf, there is another container weight distribution at page 71 (Abbildung 7). It would be interesting to add a validation. The latter mixes empty containers and full containers of all different lengths. In addition, it uses slightly different weight categories. Still it could be interesting to plot them side-by-side and check if the weight distribution is approximately the same.