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

  emergency |
        use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,967       99.67       99.67
          2 |          3        0.03       99.70
          3 |          1        0.01       99.71
          5 |          7        0.07       99.78
          6 |          4        0.04       99.82
          8 |          1        0.01       99.83
          9 |         17        0.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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