Frequencies for first 10,000 rows of popprovm variable in namcs2000 dataset :

estimated # |
 of inscope |
  providers |
     in psu |
   (masked) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,538       55.38       55.38
        747 |        106        1.06       56.44
        913 |         69        0.69       57.13
       1034 |        248        2.48       59.61
       1079 |         73        0.73       60.34
       1222 |        180        1.80       62.14
       1328 |        163        1.63       63.77
       1620 |         39        0.39       64.16
       2024 |        153        1.53       65.69
       2160 |         25        0.25       65.94
       2208 |        269        2.69       68.63
       2350 |        249        2.49       71.12
       2538 |        239        2.39       73.51
       2970 |        287        2.87       76.38
       3128 |        463        4.63       81.01
       3328 |        259        2.59       83.60
       3864 |        436        4.36       87.96
       4096 |        164        1.64       89.60
       4860 |        313        3.13       92.73
       5120 |        238        2.38       95.11
       7424 |        489        4.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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