Frequencies for first 10,000 rows of emer_use variable in person dataset :

  EMERGENCY |
        USE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,216       92.16       92.16
          1 |         15        0.15       92.31
          9 |         14        0.14       92.45
          . |        755        7.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016