Frequencies for first 10,000 rows of isreferralrequiredforspecialist variable in plan2017 dataset :

       Is a |
   Referral |
   Required |
        for |
Specialist? |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,343       13.43       13.43
         No |      4,908       49.08       62.51
        Yes |      3,749       37.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 8 Dec 2017