Frequencies for first 10,000 rows of pct013c020 variable in sf12000860us31 dataset :

  65 and 66 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,069       90.69       90.69
          1 |        723        7.23       97.92
          2 |        120        1.20       99.12
          3 |         44        0.44       99.56
          4 |         15        0.15       99.71
          5 |          9        0.09       99.80
          6 |          5        0.05       99.85
          7 |          3        0.03       99.88
          8 |          1        0.01       99.89
          9 |          1        0.01       99.90
         10 |          1        0.01       99.91
         12 |          1        0.01       99.92
         15 |          1        0.01       99.93
         21 |          1        0.01       99.94
         22 |          1        0.01       99.95
         26 |          1        0.01       99.96
         29 |          1        0.01       99.97
         34 |          1        0.01       99.98
         36 |          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