Vladika and
Perhaps you'd prefer shipping traffic in the age of sail or the 1900s?
Why not 10%? none of those arguments are substantial because the canon does not support an express opinion about Corridor sector travel. In this particular instance, I believe leveraging GT material is a fatal flaw. They have a very limited view (much from Loren) based on the same data flaws CT had. Business travel could be extensive and there is no reasoning the tens of millions of corporations don't have full low berths shipping people back and forth to their interests.
It's human nature. Look, I have 4 holding in 3 sectors over a 4 sector area. LOL Savage is not going back and forth all year.
There are many arguments here. There is some good adventuring here. Also, the players are not always wealthy and often work for another individual. Marc's Traveller promoted Travel in CT. So, I think you're restricting yourselves. Pulling a number tens of billions lower than Rancke's calculation seems characteristic. How about Traveller's from the Vargr states hungry for human business?
Although, I like some GT products for lack of any resources, their world descriptions and lack of a decent economic foundation are weak. I don't want to be closed minded about something so open for debate. Pull up some canon reading I need to re-review.
The median income human on 20th C earth has never been more than 100 miles from home. The mean income human lives most of their lives within 200 miles of where they were borne, but has gone a bit further afield.