For each week beginning on a given date, the figures show the number of sites that reported they are using the ec_recurring 6.x-1.x-dev release.

e-Commerce recurring transactions project page
ec_recurring 6.x-1.x-dev release page
All e-Commerce recurring transactions usage statistics
Usage statistics for all projects

Week starting Count
May 3rd, 2015 1
April 26th, 2015 1
April 5th, 2015 1
March 29th, 2015 1
March 15th, 2015 1

Only Drupal websites using the Update Status module are included in the data. Read more information about how these statistics are calculated.