Translate the following English sentence to French:
"Nevertheless, this is a relatively modest increase - of only 3% cumulatively per year - and this is less comparatively than the increase over the same period in land transport, which has been 26%."
Néanmoins, son taux de croissance est objectivement modeste - le taux de croissance annuel cumulé n'atteint que 3 % -, et inférieur à celui que connaît le transport terrestre, à savoir, 26 %.