Frequencies for first 10,000 rows of pct013c045 variable in sf12000860us31 dataset :

   67 to 69 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,783       87.83       87.83
          1 |        838        8.38       96.21
          2 |        210        2.10       98.31
          3 |         78        0.78       99.09
          4 |         38        0.38       99.47
          5 |         19        0.19       99.66
          6 |          9        0.09       99.75
          7 |          4        0.04       99.79
          8 |          4        0.04       99.83
          9 |          2        0.02       99.85
         11 |          3        0.03       99.88
         14 |          2        0.02       99.90
         16 |          1        0.01       99.91
         22 |          1        0.01       99.92
         23 |          1        0.01       99.93
         30 |          1        0.01       99.94
         33 |          1        0.01       99.95
         39 |          2        0.02       99.97
         50 |          1        0.01       99.98
         59 |          1        0.01       99.99
         97 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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