Frequencies for first 10,000 rows of monthdth variable in mort1975 dataset :

   monthdth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,026       10.26       10.26
          2 |        933        9.33       19.59
          3 |        913        9.13       28.72
          4 |        817        8.17       36.89
          5 |        769        7.69       44.58
          6 |        756        7.56       52.14
          7 |        804        8.04       60.18
          8 |        876        8.76       68.94
          9 |        785        7.85       76.79
         10 |        810        8.10       84.89
         11 |        730        7.30       92.19
         12 |        781        7.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015