Frequencies for first 10,000 rows of auth variable in namcs1999 dataset :

        was |
authorizati |
on required |
  for care? |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,487       14.87       14.87
          2 |      7,556       75.56       90.43
          3 |        768        7.68       98.11
          4 |        189        1.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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