in 1979 how many places did the cosworth engine decrease from start to finish?
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col : year | chassis | engine | start | finish row 1 : 1974 | eagle | offy | 21st | 7th row 2 : 1975 | eagle | offy | 18th | 4th row 3 : 1976 | eagle | offy | 6th | 5th row 4 : 1977 | eagle | offy | 8th | 15th row 5 : 1978 | lighning | cosworth | 21st | 24th row 6 : 1979 | lighning | cosworth | 17th | 20th row 7 : 1980 | penske | cosworth | 8th | 6th row 8 : 1981 | penske | cosworth | 10th | 28th row 9 : 1982 | march | cosworth | 10th | 3rd row 10 : 1983 | march | cosworth | 14th | 7th row 11 : 1984 | march | cosworth | 21st | 19th row 12 : 1985 | march | buick | 1st | 33rd row 13 : 1986 | lola | cosworth | 14th | 16th row 14 : 1987 | march | cosworth | 29th | 27th row 15 : 1988 | march | buick | qualifying crash |  row 16 : 1989 | lola | cosworth | 32nd | 22nd row 17 : 1990 | lola | cosworth | 22nd | 29th row 18 : 1991 | lola | buick | 32nd | 21st row 19 : 1992 | lola | buick | failed to qualify |  row 20 : 1994 | lola | chevrolet | failed to qualify |
in 1979 how many places did the cosworth engine decrease from start to finish?
Year Chassis Engine Start Finish
1974 Eagle Offy 21st 7th
1975 Eagle Offy 18th 4th
1976 Eagle Offy 6th 5th
1977 Eagle Offy 8th 15th
1978 Lighning Cosworth 21st 24th
1979 Lighning Cosworth 17th 20th
1980 Penske Cosworth 8th 6th
1981 Penske Cosworth 10th 28th
1982 March Cosworth 10th 3rd
1983 March Cosworth 14th 7th
1984 March Cosworth 21st 19th
1985 March Buick 1st 33rd
1986 Lola Cosworth 14th 16th
1987 March Cosworth 29th 27th
1988 March Buick Qualifying Crash
1989 Lola Cosworth 32nd 22nd
1990 Lola Cosworth 22nd 29th
1991 Lola Buick 32nd 21st
1992 Lola Buick Failed to Qualify
1994 Lola Chevrolet Failed to Qualify
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