Frequencies for ser_tr variable in person dataset :

        VIN |
Series-Truc |
          k |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        258       19.52       19.52
        *** |        100        7.56       27.08
        999 |        928       70.20       97.28
        C10 |          1        0.08       97.35
        C15 |          1        0.08       97.43
        CLU |         17        1.29       98.71
        COF |          1        0.08       98.79
        COL |          1        0.08       98.87
        COU |          1        0.08       98.94
        CWS |          1        0.08       99.02
        JEE |          6        0.45       99.47
        MHV |          3        0.23       99.70
        VAN |          4        0.30      100.00
------------+-----------------------------------
      Total |      1,322      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016