Table:
text: 2009 Colorado Mammoth season
Regular season
Game log
Game Date_ Opponent Location_ Score OT Attendance Record_
1 January 9, 2009 @ Portland LumberJax Rose Garden W 12–10  6859 1–0
2 January 10, 2009 Portland LumberJax Pepsi Center L 5–14  16987 1–1
3 January 24, 2009 Edmonton Rush Pepsi Center L 9–11  16734 1–2
4 January 31, 2009 New York Titans Pepsi Center W 12–8  15023 2–2
5 February 7, 2009 @ Minnesota Swarm Xcel Energy Center W 13–8  11174 3–2
6 February 14, 2009 Calgary Roughnecks Pepsi Center W 13–12  17712 4–2
7 February 21, 2009 @ San Jose Stealth HP Pavilion at San Jose L 9–14  5576 4–3

Question: What was the average attendance against Portland Lumberjax on January 9, 2009 for the 2009 Colorado Mammoth season?