Frequencies for s3_1_c4_02904 variable in hcris2552_96_2006 dataset :

s3_1_c4_029 |
         04 |      Freq.     Percent        Cum.
------------+-----------------------------------
         18 |          1        0.02        0.02
         28 |          1        0.02        0.03
       3153 |          1        0.02        0.05
          . |      6,230       99.95      100.00
------------+-----------------------------------
      Total |      6,233      100.00

by Jean Roth , jroth@nber.org , 10 Sep 2018