Hi mr. Mardian. Here are my suggestions for you
... stuff in million tonnes that has been delivered by four methods ...
use the present perfect tense when the data is available until the present time (assumption 2016).
... but pipeline was steady (at ?)
... while road had a fluctuation (try to write down the data for the road)
Overall, you present the data in a well-developed and simple form.
again, don't forget to upload the graph before starting new thread.Goodluck and Keep Spirited.