Table showing daily duration of civil twilight

On 17:48 23 Oct 2020, Barry Schwarz said:
On Fri, 23 Oct 2020 Pamela wrote:

I am interested in the duration of civil twilight each day for a given
location.

Where can I get a table listing this value for each day of the year?

Of course I will need to specify the coordinates of the location. To be
clear I mean the duration between sunset and civil dusk, not the start
and end times.

Did none of the sites that Google suggested not do what you want. What
was wrong with https://avcams.faa.gov/sunrise_sunset.php or
https://www.timeanddate.com/sun/usa/seattle or
https://www.timeanddate.com/sun/usa/seattle.

Thanks for the links but those sites don't do what I want.

I'm looking for a day by day listing of the DURATION of civil twilight,
not a list of start and end times.