This is not scientific or "real". This is based on the very limited data that people contribute to the spreadsheet, and who know how often they come back to update (amongst so many other factors). But it's the best we have access to.
It's not like the London VO actually did 4 PPRs only over December, but they did 4 from the data we have collected as a group. Compared to the same data we have, LVO did 14 PPRs in Nov, and 12 PPRs in Oct. So you can see the relative reduction that happened in Dec. That's the point I wanted to get across in my post there.
I have created sheets in the spreadsheet where I did all this analysis, calculations, and formulas to collect that info and see it easily. Here's the spreadsheet:
https://docs.google.com/spreadsheets/d/192sbvjd4vJsEWY_B7w5DgFKBmIPNYo6TjlVWAk-xxxA/edit#gid=2037240319