Translate the following English sentence to French:
"The figures speak for themselves: in 1970, the railways had a 21% share of the goods transport market; today they have only 8.5%."
Les chiffres ne nécessitent pas de commentaires : en 1970, le chemin de fer possédait 21 % des parts de marché du trafic marchandises, aujourd' hui, seulement 8,5 %.