No Market Share movement for Drupal Version 7.3x yet sorry.
Get a list of 60,307 websites using Drupal Version 7.3x which includes location information, hosting data, contact details, 10,798 currently live websites
and an additional 10,003 domains that redirect to sites in this list. 49,509 sites that used this technology previously and 4,192 websites in the United States currently using Drupal Version 7.3x.
Distribution of locations of all Drupal Version 7.3x customers we've ever tracked.