what are the years listed that the portland timbers played during?
2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
what are the average attendance amounts for those years?
7,169, 6,260, 5,871, 5,628, 6,028, 5,575, 6,851, 8,567, 9,734, 10,727
which of those amounts was for the year 2007?
6,851