When we started the NLBC almost 3 years ago (!!) I decided I would track at least some of the same information I do for my personal reading since I thought others would like to see some of it. Here's the chart for just the NLBC publication dates:
The club spreadsheet has everything for the NLBC, the Literary Club, and the old MR club too.
See the stats tab.
Personally, I've been tracking this for about 10 years and really wish I had done this for the preceding decades of my life. I don't normally post it till the end of the year but you can see previous years from links at the bottom of my 2020 post if you want. The 2019 summary information is pretty typical of what I track.