Frequencies for first 10,000 rows of popprovm variable in namcs1998 dataset :

estimated # |
 of inscope |
  providers |
     in psu |
   (masked) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,336       53.36       53.36
       1047 |        112        1.12       54.48
       1115 |        151        1.51       55.99
       1238 |        155        1.55       57.54
       1239 |        228        2.28       59.82
       1858 |         71        0.71       60.53
       2000 |        392        3.92       64.45
       2571 |        322        3.22       67.67
       2817 |        269        2.69       70.36
       2967 |        130        1.30       71.66
       3193 |        298        2.98       74.64
       3550 |        128        1.28       75.92
       3709 |        183        1.83       77.75
       3944 |        363        3.63       81.38
       4204 |        199        1.99       83.37
       4319 |        384        3.84       87.21
       4421 |        224        2.24       89.45
       4946 |        282        2.82       92.27
       5084 |        285        2.85       95.12
       5305 |        319        3.19       98.31
       6631 |        169        1.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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