Frequencies for first 10,000 rows of auth variable in namcs1997 dataset :

        was |
authorizati |
on required |
  for care? |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        963        9.63        9.63
          2 |      8,276       82.76       92.39
          3 |        594        5.94       98.33
          4 |        167        1.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016