Table:
text: Cog Hill Golf & Country Club
Western Open
Western Open
Year_ Player Country Score To_Par Margin Earnings_
1995 Billy Mayfair United States 73-70-69-67=279 −9 1 360000
1994 Nick Price Zimbabwe 67-67-72-71=277 −11 1 216000
1993 Nick Price Zimbabwe 64-71-67-67=269 −19 5 216000
1992 Ben Crenshaw United States 70-72-65-69=276 −12 2 198000
1991 Russ Cochran United States 66-72-68-69=275 −13 2 180000

Question: What is Russ Cochran's average margin at Cog Hill Golf & Country Club?