Frequencies for first 10,000 rows of pmsarank variable in morg88 dataset :

       PMSA |
    ranking |
    (1985+) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,115       41.15       41.15
          2 |        996        9.96       51.11
          3 |        319        3.19       54.30
          4 |        122        1.22       55.52
          5 |         76        0.76       56.28
          6 |         23        0.23       56.51
          9 |         36        0.36       56.87
          . |      4,313       43.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Mar 2017