Frequencies for first 10,000 rows of totther variable in namcs1997 dataset :

  total # of therapeutic/preventive |
                           services |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                                  0 |      5,894       58.94       58.94
                                  1 |      2,346       23.46       82.40
                                  2 |      1,103       11.03       93.43
                                  3 |        470        4.70       98.13
                                  4 |        121        1.21       99.34
                                  5 |         38        0.38       99.72
                                  6 |          7        0.07       99.79
                                  7 |          3        0.03       99.82
                                  8 |          2        0.02       99.84
                                 10 |          1        0.01       99.85
All boxes blank, including None box |         15        0.15      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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