Frequencies for first 10,000 rows of pct012k043 variable in sf12000860us26 dataset :

   40 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,645       86.45       86.45
          1 |        970        9.70       96.15
          2 |        243        2.43       98.58
          3 |         73        0.73       99.31
          4 |         25        0.25       99.56
          5 |         17        0.17       99.73
          6 |          6        0.06       99.79
          7 |          4        0.04       99.83
          8 |          1        0.01       99.84
          9 |          1        0.01       99.85
         10 |          2        0.02       99.87
         11 |          2        0.02       99.89
         19 |          1        0.01       99.90
         21 |          1        0.01       99.91
         23 |          1        0.01       99.92
         25 |          1        0.01       99.93
         28 |          2        0.02       99.95
         36 |          1        0.01       99.96
         42 |          1        0.01       99.97
         61 |          1        0.01       99.98
         64 |          1        0.01       99.99
         78 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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