The End of Year Survey is an annual tradition initiated by and designed under the chairmanship of Dr. George Gallup in 1977. It is conducted every year since then. This year it was carried out by the Gallup International Association in 69 countries around the world.
A total of 66541 people were interviewed globally. In each country a representative sample of around 1000 men and women was interviewed either face to face (25 countries; n=29211), via telephone (13 countries; n=10754), online (25 countries; n=23947) or through mixed methods (3 countries; n=2629). The field work was conducted during November – December 2016. The margin of error for the survey is between +/-3-5% at 95% confidence level.
In Bulgaria End of Year Survey 2016 was carried out by Gallup International.