No Market Share movement for Drupal 7 yet sorry.
Get a list of 1,023,882 websites using Drupal 7 which includes location information, hosting data, contact details, 531,690 currently live websites
which includes 182,524 domains that redirect to sites in the list. 674,716 sites that used this technology previously and 138,538 websites in the United States currently using Drupal 7.
Distribution of locations of all Drupal 7 customers we've ever tracked.