Frequencies for first 10,000 rows of pct012c163 variable in sf12000860us18 dataset :

   56 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,011       90.11       90.11
          1 |        753        7.53       97.64
          2 |        143        1.43       99.07
          3 |         46        0.46       99.53
          4 |         19        0.19       99.72
          5 |          9        0.09       99.81
          6 |          4        0.04       99.85
          7 |          1        0.01       99.86
          9 |          1        0.01       99.87
         10 |          2        0.02       99.89
         11 |          1        0.01       99.90
         12 |          2        0.02       99.92
         13 |          1        0.01       99.93
         16 |          1        0.01       99.94
         25 |          1        0.01       99.95
         27 |          1        0.01       99.96
         30 |          1        0.01       99.97
         35 |          1        0.01       99.98
         37 |          1        0.01       99.99
         48 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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