And with 2.3M customers, that's an average 1.7 Mbit/s per customer, or 550 GB per customer per month, which is kinda high. The average American internet user probably consumes less than 100 GB/month. (HN readers are probably outliers; I consume about 1 TB/month).
But that’s me.
Even back to 1950, for per household data, it was above 4 hours.
[1] https://www.nielsen.com/insights/2009/average-tv-viewing-for...
They didn't have per person for the 1950 to 1990 data, only household (pdf in the link).