Frequencies for first 10,000 rows of attend variable in natl1979 dataset :

  Person in |
 Attendance |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,833       98.33       98.33
          2 |        139        1.39       99.72
          3 |         26        0.26       99.98
          9 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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