Frequencies for first 10,000 rows of dob_mm variable in linkpe2009psden dataset :

Birth Month |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,007       40.07       40.07
          2 |      3,112       31.12       71.19
          3 |        317        3.17       74.36
          4 |        269        2.69       77.05
          5 |        281        2.81       79.86
          6 |        245        2.45       82.31
          7 |        273        2.73       85.04
          8 |        302        3.02       88.06
          9 |        284        2.84       90.90
         10 |        319        3.19       94.09
         11 |        307        3.07       97.16
         12 |        284        2.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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