There might not be many people taking that train from Chicago -> Los Angeles, but I wonder how many people take it for part of that route? There are 32 stations

There might not be many people taking that train from Chicago -> Los Angeles, but I wonder how many people take it for part of that route? There are 32 stations on that route. I had occasion once to take Amtrak from East Texas to Los Angeles and there were only a handful of other people doing that, but there were a ton of people who got on and later got off between East Texas and Los Angeles. For these long Amtrak routes they are probably best thought of not as a means to travel from one endpoint to the other, which will almost always be faster and cheaper to do by air, but rather as a collection of local or regional routes arranged end to end that share trains.