Define legend characteristics for the state maps. VALUE= specifies text for the legend values that describes the ranges specified by MIDPOINTS= in the BLOCK statement. 
legend1 shape=bar(3,4)
        label=('Number of Sites'
               position=(top center))
        value=(j=l '0-24' '25-49' '50-74' '75-99' 'over 100')
        frame;