Frequencies for first 10,000 rows of pct012c151 variable in sf12010860us22 dataset :

   44 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,316       83.16       83.16
          1 |      1,038       10.38       93.54
          2 |        342        3.42       96.96
          3 |        142        1.42       98.38
          4 |         72        0.72       99.10
          5 |         33        0.33       99.43
          6 |         12        0.12       99.55
          7 |         14        0.14       99.69
          8 |          6        0.06       99.75
          9 |          6        0.06       99.81
         10 |          4        0.04       99.85
         12 |          2        0.02       99.87
         13 |          1        0.01       99.88
         14 |          1        0.01       99.89
         15 |          1        0.01       99.90
         17 |          1        0.01       99.91
         18 |          1        0.01       99.92
         19 |          1        0.01       99.93
         21 |          1        0.01       99.94
         28 |          1        0.01       99.95
         40 |          1        0.01       99.96
         44 |          1        0.01       99.97
         51 |          1        0.01       99.98
         63 |          1        0.01       99.99
         74 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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