Frequencies for first 10,000 rows of totdiag variable in nhamcsed2010 dataset :

   Total number of diagnostic/screening |
           services ordered or provided |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
'none' box and all item fields are blan |        130        1.30        1.30
                                      0 |      2,937       29.37       30.67
                                      1 |      2,153       21.53       52.20
                                      2 |        792        7.92       60.12
                                      3 |        486        4.86       64.98
                                      4 |        409        4.09       69.07
                                      5 |        469        4.69       73.76
                                      6 |        456        4.56       78.32
                                      7 |        431        4.31       82.63
                                      8 |        473        4.73       87.36
                                      9 |        358        3.58       90.94
                                     10 |        281        2.81       93.75
                                     11 |        204        2.04       95.79
                                     12 |        150        1.50       97.29
                                     13 |        103        1.03       98.32
                                     14 |         68        0.68       99.00
                                     15 |         50        0.50       99.50
                                     16 |         31        0.31       99.81
                                     17 |         14        0.14       99.95
                                     18 |          4        0.04       99.99
                                     19 |          1        0.01      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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