From 0 to 8 none at all. We went to the neighbors to watch Capt. Kangaroo.
8 to 24 and married equaled 1. Later we got a larger screen for the living room and a small (almost invisible) one for the bedroom.
From age 25 til about 45 I spent more of the time explaining why the kids couldn't have their own. (Because I said so)
54 to present just 1 but it is a big mama jama.
1 black and white until we got a color tv late 1960's? Color tv was a fancy console, likely from Sears LOL. My Dad had to replace tubes all the time. We had to spin the antenna on top of the tv to get channel 38 (Boston) so Mom could watch the Bruins but it was still fuzzy.
DH and I have 5 tv's now including one in the garage for him...didn't see that happening even a few years ago. We got a 32" and mounted it above his tool bench. Mr Fix It can now watch YT on how to fix whatever on the vintage car or listen to music videos. For less than $150 it made him VERY HAPPY!
One console one, in a cabinet in the living room. Then grandmother moved in with us and she had to have a tv in her room, so we got a small portable one for her.