Frequencies for first 10,000 rows of pct012c050 variable in sf12010860us22 dataset :

   47 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,262       82.62       82.62
          1 |      1,110       11.10       93.72
          2 |        337        3.37       97.09
          3 |        139        1.39       98.48
          4 |         63        0.63       99.11
          5 |         33        0.33       99.44
          6 |         15        0.15       99.59
          7 |         17        0.17       99.76
          8 |          4        0.04       99.80
          9 |          1        0.01       99.81
         10 |          1        0.01       99.82
         11 |          2        0.02       99.84
         12 |          1        0.01       99.85
         13 |          1        0.01       99.86
         14 |          2        0.02       99.88
         15 |          1        0.01       99.89
         16 |          1        0.01       99.90
         20 |          1        0.01       99.91
         23 |          1        0.01       99.92
         24 |          2        0.02       99.94
         41 |          1        0.01       99.95
         44 |          1        0.01       99.96
         52 |          1        0.01       99.97
         57 |          1        0.01       99.98
         64 |          1        0.01       99.99
         76 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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