Frequencies for first 10,000 rows of emer_psych_srvc_cd variable in pos2007 dataset :

       srv: |
psychiatric |
 -emergency |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,682       86.82       86.82
          0 |      1,266       12.66       99.48
          1 |         36        0.36       99.84
          2 |         10        0.10       99.94
          3 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017