Westercon 69 Attendance Update

I received from Westercon 69 chair Lea Rush the post-con attendance/membership update. Westercon 69 reports 1,577 on-site attendees (the "warm-body count" figure) and 1,673 total members of all types. (The latter includes supporting members and attending members who did not claim their badges.)

I have updated the Westercon History web page to reflect this information.