What is the third factor

5. Cheese consumption and the number of people who die from tangled bedsheets. Per capita cheese consumption correlates with Number of people who died by becoming tangled in their bedsheets 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 800 deaths 331bs 600 deaths 31.Slbs Bedsheet tanglings Cheese consumed 400 deaths 3016s 28.51bs 200 deaths 2000 2001 2002 2003 200 2005 2006 2007 2008 2009 Bedsheet tanglings Cheese consumed Third Factor