Expression help

[RAldridge]

Hello list,

I'm needing help writing expressions to classify forest stands by age.  My shapefile includes a data item named "AGE2000" which is a numeric item representing the age fo the stand.  How do I need to set up classes if I want to represent the data in 10-year age classes.  Values of "AGE2000" range from 0 to 74.  Right now I have:

LAYER
  NAME standage
  TYPE polygon
  STATUS off
  DATA stand110
  CLASSITEM "AGE2000"
  CLASS
    NAME "0 - 9"
    EXPRESSION "???"
    SYMBOL 0
    OUTLINECOLOR 0
    COLOR 50 255 50
  END
  CLASS
    NAME "10 - 19"
    EXPRESSION "???"