In December 2019 I made a pie chart of the demographics of the mailing list. At that time the list was 114 people. Now it is 385 people. The chart to the right is not currrent, but perhaps it provides a hazy clue as to the current demographics of the sfbarf mailing list.
I determined people’s jobs by googling them. 19.4% of the list members in December had nothing on google associated with the email address they gave me.