Cell phone Smartphone Desktop or laptop computer Tablet Game console Portable gaming device iPod/mp3 player A personal digital device like a Sidekick, Palm Pilot or BlackBerry
12/2004 45 75 7
11/2006 63 79 51 8
11/2007 71 59
2/2008 71 60 77 55 74
9/2009 75 69 80 51 79
7/2011 77 74
9/2012 78 37 80 23