Google+ accounts : 1,772,056,152
Google- accounts : 35,105,707
How do we calculate the number of Google+ accounts?
Before November 15, 2012, we use the numbers Google provided publicly. After that date, we began calculating the number on our own.
To achieve a tally, we first download the Google+ Sitemap :
This file itself does not contain any profile data, but it does have links to the 50,000 sub-sitemap files that do.
For each of these sub-sitemap files, we download, parse, and count the number of Google+ and Google- profiles links.
Tallying the data from all 50,000 files together gives us two numbers: the number of Google+ accounts and the number of Google- accounts.
A Google- account is a Google+ account where the G+ feature has been disabled.
We do this once a day.
At certain times however, the Google+ sitemap has been known to be unavailable or 404 to put it more technically.
You can see this in terms of data point sparsity during certain periods, for example: mid April 2013 until July 2013.
The backend processing code that tallies profile data has been completely re-written from scratch!
In v1, if a single sub-sitemap file failed to download, the whole daily count was lost. No longer!
In v2, there is much improved error checking and fault tolerance. Going forward, we should get an accurate tally more frequently.
To go along with this new backend upgrade ~ a new frontend update has also been completed!
We've also made the x-axis data ordinal per suggestions. ENJOY!