Frequencies for first 10,000 rows of pct012c143 variable in sf12000860us18 dataset :

   36 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,428       84.28       84.28
          1 |      1,057       10.57       94.85
          2 |        284        2.84       97.69
          3 |        109        1.09       98.78
          4 |         44        0.44       99.22
          5 |         20        0.20       99.42
          6 |         20        0.20       99.62
          7 |         10        0.10       99.72
          8 |          6        0.06       99.78
          9 |          4        0.04       99.82
         10 |          3        0.03       99.85
         11 |          1        0.01       99.86
         12 |          2        0.02       99.88
         14 |          2        0.02       99.90
         18 |          1        0.01       99.91
         19 |          1        0.01       99.92
         36 |          2        0.02       99.94
         38 |          1        0.01       99.95
         44 |          1        0.01       99.96
         50 |          1        0.01       99.97
         60 |          1        0.01       99.98
         63 |          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