Frequencies for first 10,000 rows of pct012c134 variable in sf12000860us18 dataset :

   27 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,673       86.73       86.73
          1 |        904        9.04       95.77
          2 |        218        2.18       97.95
          3 |        107        1.07       99.02
          4 |         35        0.35       99.37
          5 |         22        0.22       99.59
          6 |          7        0.07       99.66
          7 |          5        0.05       99.71
          8 |          9        0.09       99.80
          9 |          3        0.03       99.83
         10 |          4        0.04       99.87
         11 |          1        0.01       99.88
         12 |          1        0.01       99.89
         13 |          1        0.01       99.90
         16 |          1        0.01       99.91
         21 |          1        0.01       99.92
         32 |          1        0.01       99.93
         33 |          1        0.01       99.94
         36 |          1        0.01       99.95
         46 |          1        0.01       99.96
         56 |          1        0.01       99.97
         71 |          1        0.01       99.98
         72 |          1        0.01       99.99
         87 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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