Frequencies for first 10,000 rows of pct012m048 variable in sf12000860us28 dataset :

   45 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,825       98.25       98.25
          1 |        165        1.65       99.90
          2 |          9        0.09       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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