Frequencies for first 10,000 rows of totther variable in namcs1999 dataset :

  total # of therapeutic/preventive |
                           services |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                                  0 |      6,479       64.79       64.79
                                  1 |      2,006       20.06       84.85
                                  2 |      1,051       10.51       95.36
                                  3 |        302        3.02       98.38
                                  4 |         95        0.95       99.33
                                  5 |         37        0.37       99.70
                                  6 |         19        0.19       99.89
                                  7 |          7        0.07       99.96
                                  8 |          3        0.03       99.99
                                  9 |          1        0.01      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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