what is the number of games in this rivalry that took place in the 1980s?
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col : year | date | winner | result | loser | attendance | location row 1 : 1980 | oct 19 | chicago bears | 24-7 | detroit lions |  | chicago, illinois row 2 : 1980 | nov 27 | chicago bears | 23-17 (ot) | detroit lions | 58,508 | pontiac, michigan row 3 : 1981 | oct 19 | detroit lions | 48-17 | chicago bears | 75,397 | pontiac, michigan row 4 : 1981 | nov 22 | detroit lions | 23-7 | chicago bears | 71,273 | chicago, illinois row 5 : 1982 | sept 12 | detroit lions | 17-10 | chicago bears | 50,082 | pontiac, michigan row 6 : 1982 | nov 21 | chicago bears | 20-17 | detroit lions | 46,783 | chicago, illinois row 7 : 1983 | oct 16 | detroit lions | 31–17 | chicago bears | 66,709 | pontiac, michigan row 8 : 1983 | oct 30 | detroit lions | 38-17 | chicago bears | 58,764 | chicago, illinois row 9 : 1984 | nov 18 | chicago bears | 16-14 | detroit lions | 54,911 | chicago, illinois row 10 : 1984 | dec 16 | chicago bears | 30-13 | detroit lions | 53,252 | pontiac, michigan row 11 : 1985 | nov 10 | chicago bears | 24-3 | detroit lions | 53,467 | chicago, illinois row 12 : 1985 | dec 22 | chicago bears | 37-17 | detroit lions | 74,042 | pontiac, michigan row 13 : 1986 | oct 26 | chicago bears | 13-7 | detroit lions | 62,064 | chicago, illinois row 14 : 1986 | dec 15 | chicago bears | 16-13 | detroit lions | 75,602 | pontiac, michigan row 15 : 1987 | nov 22 | chicago bears | 30-10 | detroit lions | 63,357 | chicago, illinois row 16 : 1988 | oct 9 | chicago bears | 24–7 | detroit lions | 64,526 | pontiac, michigan row 17 : 1988 | dec 11 | chicago bears | 13-12 | detroit lions | 55,010 | chicago, illinois row 18 : 1989 | sept 24 | chicago bears | 47-27 | detroit lions | 71,418 | pontiac, michigan row 19 : 1989 | dec 10 | detroit lions | 27-17 | chicago bears | 52,650 | chicago, illinois
what is the number of games in this rivalry that took place in the 1980s?
Year Date Winner Result Loser Attendance Location
1980 Oct 19 Chicago Bears 24-7 Detroit Lions Chicago, Illinois
1980 Nov 27 Chicago Bears 23-17 (OT) Detroit Lions 58,508 Pontiac, Michigan
1981 Oct 19 Detroit Lions 48-17 Chicago Bears 75,397 Pontiac, Michigan
1981 Nov 22 Detroit Lions 23-7 Chicago Bears 71,273 Chicago, Illinois
1982 Sept 12 Detroit Lions 17-10 Chicago Bears 50,082 Pontiac, Michigan
1982 Nov 21 Chicago Bears 20-17 Detroit Lions 46,783 Chicago, Illinois
1983 Oct 16 Detroit Lions 31–17 Chicago Bears 66,709 Pontiac, Michigan
1983 Oct 30 Detroit Lions 38-17 Chicago Bears 58,764 Chicago, Illinois
1984 Nov 18 Chicago Bears 16-14 Detroit Lions 54,911 Chicago, Illinois
1984 Dec 16 Chicago Bears 30-13 Detroit Lions 53,252 Pontiac, Michigan
1985 Nov 10 Chicago Bears 24-3 Detroit Lions 53,467 Chicago, Illinois
1985 Dec 22 Chicago Bears 37-17 Detroit Lions 74,042 Pontiac, Michigan
1986 Oct 26 Chicago Bears 13-7 Detroit Lions 62,064 Chicago, Illinois
1986 Dec 15 Chicago Bears 16-13 Detroit Lions 75,602 Pontiac, Michigan
1987 Nov 22 Chicago Bears 30-10 Detroit Lions 63,357 Chicago, Illinois
1988 Oct 9 Chicago Bears 24–7 Detroit Lions 64,526 Pontiac, Michigan
1988 Dec 11 Chicago Bears 13-12 Detroit Lions 55,010 Chicago, Illinois
1989 Sept 24 Chicago Bears 47-27 Detroit Lions 71,418 Pontiac, Michigan
1989 Dec 10 Detroit Lions 27-17 Chicago Bears 52,650 Chicago, Illinois
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