Frequencies for first 10,000 rows of attend variable in natl1982 dataset :

  Person in |
 Attendance |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,889       98.89       98.89
          2 |         74        0.74       99.63
          3 |         32        0.32       99.95
          9 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016