Season one had an average of 9.3 million, season two had 11.6 million, season three had 14.4 million, season four had 19.1 million, season five had 20.2 million, season six had 25.7 million and season seven had 32.8 million. There have been 50 locations in Ireland, including 49 in Northern Ireland and one in the Republic of Ireland. The series has used 12,986 extras in Northern Ireland alone and 2,000 Northern Ireland crew members across the series' eight seasons. Weeks of post-production per season were: season one (17), season two (21), season three (20), season four (21), season five (22), season six (24), season seven (30) and season eight (42). The above numbers have been confirmed by HBO but other numbers are being reported that the cable giant has not confirmed.

Source: Forbes April 11, 2019 17:25 UTC