Frequencies for first 10,000 rows of xtrcrprl_shck_lthtrptr_srvc_cd variable in

  Services: |
  ESWL Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,580       85.80       85.80
          0 |      1,233       12.33       98.13
          1 |         41        0.41       98.54
          2 |        100        1.00       99.54
          3 |         46        0.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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