The October 1, 2019 dataset for the Dramatic Growth of Open Access is now available at: Morrison, Heather, 2019, "Dramatic Growth of Open Access October 1, 2019", https://doi.org/10.5683/SP2/EZQ1OK, Scholars Portal Dataverse, V1
The dataset is in excel format and is easy to manipulate to create custom growth charts or to calculate growth rates for particular services. For example, the number of texts (books) in the Internet Archive as of October 1, 2019 is 21,521,063, up from 21,070,269 on June 30. That's a growth rate of over 450,000 free books in just one quarter! If you divide this amount by 92 (the number of days in one quarter), that's a growth rate of 4,900 books per day (or close to 5,000 books per day).
If anyone is using this data in a creative way and would like to share with others, please let me know in the comments or via e-mail.