Frequencies for first 10,000 rows of pct012k047 variable in sf12010860us30 dataset :

   44 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,724       87.24       87.24
          1 |        946        9.46       96.70
          2 |        212        2.12       98.82
          3 |         69        0.69       99.51
          4 |         24        0.24       99.75
          5 |          6        0.06       99.81
          6 |          3        0.03       99.84
          7 |          1        0.01       99.85
          8 |          2        0.02       99.87
          9 |          1        0.01       99.88
         11 |          1        0.01       99.89
         13 |          1        0.01       99.90
         16 |          2        0.02       99.92
         19 |          1        0.01       99.93
         29 |          1        0.01       99.94
         30 |          1        0.01       99.95
         34 |          1        0.01       99.96
         36 |          1        0.01       99.97
         52 |          1        0.01       99.98
         74 |          1        0.01       99.99
         76 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017