When asked what they believe the "Saucers" are, they replied in the following percentages:
33% - No answer, don't know
29% - Imagination, optical illusion, mirage, etc.
15% - U.S. Secret weapon, atomic bomb project, etc.
10% - Hoax
03% - Weather forecasting devices
02% - Searchlights on airplanes
01% - Russian secret weapon
09% - Other explanations
They add up to 102% because people were allowed to answer more than once. The "other explanations" included comets or meteors, a Biblical signal of armageddon, something to do with radio waves, and a new product by the "DuPont people." Notably absent is the extraterrestrial hypothesis which is because this survey was taken in August of 1947 (which isn't to say the idea was not floated). In contrast to the ninety percent who were familiar with flying saucers, the article points out that only half knew what the Marshall Plan was and sixty one percent knew the Taft-Hartley bill.
The article was published on August 14th (and written by George Gallup!), so not even two months had passed since "flying saucers" had entered the public's lexicon. And when I was looking through the early newspaper articles about flying saucers I noticed something funny. At first they would report accounts of sightings and the opinion of scientists and various government and military officials, then the articles turn into stories about hoaxes and how flying saucers have worn out their welcome, then flying saucers are either a joke or an advertising gimmick. And all of this takes place within a week. Fascinating.
I also came across an article from July 6th that has VFW commander Louis E. Starr alleging a government cover-up. Not even two weeks after saucers were initially sighted! Fascinating! There is a lot of interesting information in those old articles.
Edit: It seems that as recently as 1949 "photographed" was spelled "photografed!"