Frequencies for first 10,000 rows of auth variable in namcs1998 dataset :

        was |
authorizati |
on required |
  for care? |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        598        5.98        5.98
          2 |      8,766       87.66       93.64
          3 |        569        5.69       99.33
          4 |         67        0.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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