PPRuNe Forums - View Single Post - 14 day quarantine
Thread: 14 day quarantine
View Single Post
Old 5th Jul 2020, 05:18
  #346 (permalink)  
anxiao
 
Join Date: Dec 2016
Location: Kipling's Twain
Age: 72
Posts: 318
Received 50 Likes on 11 Posts
A very interesting graph. I wonder what happened around 1980 that started the downward trend?
anxiao is offline  
Reply