Here are some facts about US gaming industry:

• Computer and video games software sale grew 22.9 % in 2008 (valued $11.7 billion)
• 68 % of American households play
• Average age of gamer is 35 and he has been playing for 12 years
• Average age of game purchaser is 39 years
• 40 % of gamers are women
• 84 % of games sold in 2008 rated “E”, “T”, or “E10+”
• 92 % of underage players (bellow 18) report their parents were present at purchase or rental of games
• 63 % of parents  believe games are a positive part of their children’s lives

The above facts are summarised from ESA (entertainment software association). I included ones I find interesting.