Frequencies for first 10,000 rows of pct012a104 variable in sf12010860us20 dataset :

 105 to 109 |
      years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,851       98.51       98.51
          1 |        136        1.36       99.87
          2 |         12        0.12       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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