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Oldtvman, in the TV repair field your list is exactly what I would expect. Although I worked in a TV shop for a very limited time in the 1970s, this is exactly what I remember.
I was just speculating that since radios were becoming solid state, the sale of the few 50C5s and 35W4s used in radios would be decreasing. I thought that this might explain why 1957 was the peak year of tube sales.
A couple of other things going on were:
1. Car radios were transitioning from tube to solid state. I had a 1960 Falcon-it had 12 volt tubes and 1 transistor. I also had (and have) a 1963 Falcon, it has a solid state radio. (My grandfather's 1953 Ford was all tube with a-almost always non-functioning-vibrator).
2. The low voltage rectifier tubes, 5U4s, etc were being replaced by diodes. The same is true with some of other diode type tubes such as the dual diode used in some TVs horizontal sections. (However, I would expect the increase in tube count due to color sets would more than offset this).
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