Frequencies for first 10,000 rows of attend variable in linkpe2009psden dataset :

  Attendant |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,400       94.00       94.00
          2 |        127        1.27       95.27
          3 |        432        4.32       99.59
          4 |          4        0.04       99.63
          5 |         22        0.22       99.85
          9 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015