How many riftborn to make?

Just as the title says, I am about fifty turns into my first Riftborn game, and I have no idea how much of my industry I should be devoting to growing my population. Currently, I am researching system upgrades about as fast as I can build them and I am keeping both of my current systems under compression singularities.

I haven't had any free space in my queues for ship production, let alone population production. I get the feeling that my industrial output should be at least double what it currently is for my production to keep pace with how fast my civilization is developing. I know that Riftborn pop has good FIDSI output, so should I be prioritizing filling my colonies pops up? Or is there a technology/law/etc that I have missed that greatly increases Industry?