Frequencies for first 10,000 rows of xtrcrprl_shck_lthtrptr_srvc_cd variable in

  Services: |
  ESWL Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,601       86.01       86.01
          0 |      1,230       12.30       98.31
          1 |         39        0.39       98.70
          2 |         88        0.88       99.58
          3 |         42        0.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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