Frequencies for s2_1_c2_16 variable in hcris2552_10_2013 dataset :

     fqhc 1 |
   provider |
     number |
    s200001 |
01600 00200 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,244       99.94       99.94
     061821 |          1        0.02       99.95
     151804 |          1        0.02       99.97
     301822 |          1        0.02       99.98
     331845 |          1        0.02      100.00
------------+-----------------------------------
      Total |      6,248      100.00

by Jean Roth , jroth@nber.org , 23 Aug 2018