Frequencies for first 10,000 rows of emer_psych_srvc_cd variable in pos2009 dataset :

       SRV: |
PSYCHIATRIC |
 -EMERGENCY |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,638       86.38       86.38
          0 |      1,249       12.49       98.87
          1 |         73        0.73       99.60
          2 |         33        0.33       99.93
          3 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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