Readers of ENR direct a steady stream of questions about the magazine’s indexes and how to accurately apply them to various construction projects. To help clarify the nature and uses of the cost ...

year avg year avg year avg year avg 1989 4615 1988 4519 1987 4406 1986 4295 1985 4195 1984 4146 1983 4066 1982 3825 1981 3535 1980 3237 1979 3003 1978 2776 1977 2576 ...