I want to know the answer to the following question:
About how much of UK's passenger traffic did Southampton handle during the inter-war period?
All the background I'm provided with is that "In particular, it is a port for cruise ships; its heyday was the first half of the 20th century, and in particular the inter-war years, when it handled almost half the passenger traffic of the UK.". Is that enough to answer the question?
Answer: yes