Average offense, by position, retrosheet years

All numbers are in linear weights runs per 650 PA, with hitting by pitchers, pinch hitters, and designated hitters excluded:

Before my birth, 1956-1969
1b +11
2b -14
3b -1
ss -15
rf +12
cf +5
lf +11
C -10

The turf years, 1970-1984
1b +12
2b -11
3b +2
ss -21
rf +9
cf +3
lf +10
C -7

Last years before the offensive explosion, 1985-1992
1b +14
2b -5
3b +1
ss -15
rf +7
cf +2
lf +7
C -11

Offensive surge, 1993-1998
1b +18
2b -8
3b 1
ss -15
rf +10
cf -1
lf +6
C -10

The modern game, 2000-2007
1b +15
2b -7
3b 0
ss -11
rf +9
cf -3
lf +10
C -13