In 2006, the Pew Global Attitudes Project

(www.people-press.org) reported that the percentage of people in Europe who reported a lot of, or some confidence (instead of not too much, or no confidence)

in President George W. Bush was 14% in France, 30% in Britain, 24% in Germany, and 7% in Spain. In 2014, the corresponding percentages reported for Barack Obama were 83%, 74%, 72%, and 58%. The reported margins of error in Spain were 1.6% for the Bush result and 3.1% for the Obama result. Find the approximate sample size in Spain for the studies.