Frequencies for first 10,000 rows of pct012c143 variable in sf12010860us22 dataset :

   36 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,492       84.92       84.92
          1 |        937        9.37       94.29
          2 |        304        3.04       97.33
          3 |        118        1.18       98.51
          4 |         63        0.63       99.14
          5 |         26        0.26       99.40
          6 |         23        0.23       99.63
          7 |         11        0.11       99.74
          8 |          7        0.07       99.81
          9 |          1        0.01       99.82
         10 |          1        0.01       99.83
         12 |          1        0.01       99.84
         13 |          2        0.02       99.86
         14 |          1        0.01       99.87
         15 |          1        0.01       99.88
         18 |          1        0.01       99.89
         19 |          1        0.01       99.90
         21 |          1        0.01       99.91
         22 |          1        0.01       99.92
         34 |          1        0.01       99.93
         41 |          1        0.01       99.94
         42 |          1        0.01       99.95
         43 |          1        0.01       99.96
         50 |          1        0.01       99.97
         67 |          1        0.01       99.98
         86 |          1        0.01       99.99
         90 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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