Nowadays, the broadcast networks get 70% of their revenue from retransmission I've been trying to find a source for this, and it's mighty hard. Especially beca

Nowadays, the broadcast networks get 70% of their revenue from retransmission I've been trying to find a source for this, and it's mighty hard. Especially because many sources mix up the national networks with the local networks, or mix up profits with revenue. Do you have a citation? I'm asking to learn, not to challenge.