Frequencies for first 10,000 rows of orthpdc_srgy_srvc_cd variable in pos2005 dataset :

       srv: |
 orthopedic |
    surgery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,731       87.31       87.31
          0 |      1,244       12.44       99.75
          1 |         21        0.21       99.96
          2 |          3        0.03       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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