[time-nuts] 60 Hz graphs

[Hal Murray]

I cleaned up the graphs.  There are a couple of big gaps in 2016.  It's pretty 
clean since then.

Each graph has 14 months - an extra before and after the nominal range.

There are a couple of big swings in late 2019: 70 and 80 seconds in a couple 
of days.

http://users.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2020.png
http://users.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2019.png
http://users.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2018.png
http://users.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2017.png
http://users.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2016.png
http://users.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2015.png
http://users.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2014.png

Each day is a color.  Days within a month alternate colors.  Alternating 
months use a different pair of colors.


-- 
These are my opinions.  I hate spam.