I want to know the answer to the following question:
How much cargo do railways transport per year?
All the background I'm provided with is that "Following major investments beginning in the early to mid-1990s, the number of train passengers per year has grown from 2.5 million in 1990, to 35 million in 2008; railways are also used to transport 6.8 million tons of cargo, per year.". Is that enough to answer the question?
Answer: yes