Frequencies for first 10,000 rows of intrn_rsdnt_srvc_cd variable in pos2012 da

   Service: |
Interns and |
  Residents |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,785       87.85       87.85
          0 |      1,192       11.92       99.77
          1 |          7        0.07       99.84
          2 |         15        0.15       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016