Frequencies for first 10,000 rows of totther variable in nhamcsopd1998 dataset :

  total # of therapeutic/preventive |
                           services |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                                  0 |      5,060       50.60       50.60
                                  1 |      2,980       29.80       80.40
                                  2 |      1,045       10.45       90.85
                                  3 |        534        5.34       96.19
                                  4 |        178        1.78       97.97
                                  5 |        120        1.20       99.17
                                  6 |         42        0.42       99.59
                                  7 |         15        0.15       99.74
                                  8 |          8        0.08       99.82
                                  9 |          3        0.03       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