Frequencies for ctrl_type variable in addr222_92 dataset :

    Control |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,523       36.51       36.51
          2 |        360        8.63       45.15
          3 |        276        6.62       51.76
          4 |      1,034       24.79       76.55
          5 |        204        4.89       81.44
          6 |        144        3.45       84.90
          7 |          5        0.12       85.02
          8 |         32        0.77       85.78
          9 |        118        2.83       88.61
         10 |         16        0.38       89.00
         11 |         67        1.61       90.60
          . |        392        9.40      100.00
------------+-----------------------------------
      Total |      4,171      100.00

by Jean Roth , jroth@nber.org , 24 Aug 2018