Frequencies for first 10,000 rows of isreferralrequiredforspecialist variable in plan2018 dataset :

       Is a |
   Referral |
   Required |
        for |
Specialist? |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,596       15.96       15.96
         No |      4,809       48.09       64.05
        Yes |      3,595       35.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 23 May 2018