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

  emergency |
        use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,971       99.71       99.71
          2 |          4        0.04       99.75
          3 |          1        0.01       99.76
          4 |          1        0.01       99.77
          5 |         11        0.11       99.88
          8 |          5        0.05       99.93
          9 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016