Table:
text: 1971 Minnesota Vikings season
Regular season
Schedule
Week Date_ Opponent Results_Final_score Results_Team_record Venue Attendance_
1 September 20 at Detroit Lions W 16–13 1–0 Tiger Stadium 54418
2 September 26 Chicago Bears L 20–17 1–1 Metropolitan Stadium 47900
3 October 3 Buffalo Bills W 19–0 2–1 Metropolitan Stadium 47900
4 October 10 at Philadelphia Eagles W 13–0 3–1 Veterans Stadium 65358
5 October 17 at Green Bay Packers W 24–13 4–1 Lambeau Field 56263
6 October 25 Baltimore Colts W 10–3 5–1 Metropolitan Stadium 49784
7 October 31 at New York Giants W 17–10 6–1 Yankee Stadium 62829
8 November 7 San Francisco 49ers L 13–9 6–2 Metropolitan Stadium 49784

text: 1971 Minnesota Vikings season
Regular season
Schedule
Week Date_ Opponent Results_Final_score Results_Team_record Venue Attendance_
9 November 14 Green Bay Packers W 3–0 7–2 Metropolitan Stadium 49784
10 November 21 at New Orleans Saints W 23–10 8–2 Tulane Stadium 83130
11 November 28 Atlanta Falcons W 24–7 9–2 Metropolitan Stadium 49784
12 December 5 at San Diego Chargers L 30–14 9–3 San Diego Stadium 54505
13 December 11 Detroit Lions W 29–10 10–3 Metropolitan Stadium 49784
14 December 19 at Chicago Bears W 27–10 11–3 Soldier Field 55049

Question: What was the difference in Week 1 and Week 12 attendance for the 1971 Minnesota Vikings?