Frequencies for month variable in vehnit dataset :

      month |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        117        7.90        7.90
          2 |        107        7.22       15.12
          3 |         92        6.21       21.34
          4 |        107        7.22       28.56
          5 |        125        8.44       37.00
          6 |        141        9.52       46.52
          7 |        149       10.06       56.58
          8 |        104        7.02       63.61
          9 |        144        9.72       73.33
         10 |        159       10.74       84.06
         11 |        127        8.58       92.64
         12 |        109        7.36      100.00
------------+-----------------------------------
      Total |      1,481      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016