It is possible that the increase doesn’t mean the are more objects in the sky, but instead reflects people’s shifting relations to technology, superstition, and their surroundings. The Toronto Sun writes:
UFO sightings in Canada are at an all-time high, according to Canadian sky-gazers. The annual report from Ufology Research documented 1,981 UFO sightings in Canada in 2012, more than double 2011’s record 986.
While 40% of Canada’s UFOs were spotted in Ontario, every province save Saskatchewan and P.E.I. saw mysterious lights or objects in the sky.
Among Ufology Research’s theories on the growing phenomenon: “More secret or classified military exercises and overflights are occurring over populated areas; more people are unaware of the nature of conventional or natural objects in the sky; more people are able to report their sightings with easier access to the Internet and portable technology; or even that the downturn in the economy is leading to an increased desire by some people to look skyward for assistance.”