There are a few sources of information on the Internet related to video game rentals.

One site that is especially informative is the Media Awareness Network.

Please see:

Media Industries: Video Games /Entertainment Software
http://www.media-awareness.ca/eng/indus/games/gamain.htm

(It includes an overview of the sector, rating systems, as well as some discussion on cable delivery of video games)

Video Game Culture: Leisure and Play Preferences of B.C. Teens
http://www.media-awareness.ca/eng/issues/violence/resource/reports/vgames.htm

This article provides a demographic profile of teenage video game consumers.

From their statistics and public information section see also

Media Usage: Video and Computer Games
http://www.media-awareness.ca/eng/issues/stats/usegame.htm

Media Industries: Video and Computer Games
http://www.media-awareness.ca/eng/issues/stats/indgam.htm

Media Content: Video and Computer Games
http://www.media-awareness.ca/eng/issues/stats/congam.htm

International Video Game Market Size and Growth
http://www.toy-icti.org/publications/wtf&f_2001/03.html

Online Video Games - International Survey
http://www.angusreid.com/media/dsp_displaypr_cdn.cfm
?id_to_view=1174