Frequencies for first 10,000 rows of popprovm variable in namcs1993 dataset :

estimated # |
 of inscope |
  providers |
     in psu |
   (masked) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,443       54.43       54.43
       4660 |      1,420       14.20       68.63
       5358 |        606        6.06       74.69
       8532 |        881        8.81       83.50
      13186 |        830        8.30       91.80
      16832 |        820        8.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016