Frequencies for first 10,000 rows of dobmm variable in h84 dataset :

    DATE OF |
     BIRTH: |
      MONTH |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        849        8.49        8.49
          2 |        736        7.36       15.85
          3 |        800        8.00       23.85
          4 |        800        8.00       31.85
          5 |        800        8.00       39.85
          6 |        802        8.02       47.87
          7 |        900        9.00       56.87
          8 |        917        9.17       66.04
          9 |        849        8.49       74.53
         10 |        892        8.92       83.45
         11 |        806        8.06       91.51
         12 |        849        8.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Feb 2018