Frequencies for first 10,000 rows of totdiag variable in namcs2007 dataset :

            total |
   diag/screening |
         services |
 ordered/provided |      Freq.     Percent        Cum.
------------------+-----------------------------------
entire item blank |         66        0.66        0.66
                0 |        508        5.08        5.74
                1 |        616        6.16       11.90
                2 |      1,702       17.02       28.92
                3 |      2,138       21.38       50.30
                4 |      2,100       21.00       71.30
                5 |      1,135       11.35       82.65
                6 |        627        6.27       88.92
                7 |        360        3.60       92.52
                8 |        275        2.75       95.27
                9 |        177        1.77       97.04
               10 |        116        1.16       98.20
               11 |         76        0.76       98.96
               12 |         41        0.41       99.37
               13 |         31        0.31       99.68
               14 |         14        0.14       99.82
               15 |         10        0.10       99.92
               16 |          6        0.06       99.98
               17 |          2        0.02      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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