Frequencies for first 10,000 rows of vday variable in nhamcsopd1993 dataset :

     day of |
    visit - |
       1-31 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        309        3.09        3.09
          2 |        295        2.95        6.04
          3 |        324        3.24        9.28
          4 |        380        3.80       13.08
          5 |        289        2.89       15.97
          6 |        270        2.70       18.67
          7 |        305        3.05       21.72
          8 |        416        4.16       25.88
          9 |        338        3.38       29.26
         10 |        325        3.25       32.51
         11 |        361        3.61       36.12
         12 |        358        3.58       39.70
         13 |        329        3.29       42.99
         14 |        335        3.35       46.34
         15 |        318        3.18       49.52
         16 |        317        3.17       52.69
         17 |        283        2.83       55.52
         18 |        395        3.95       59.47
         19 |        366        3.66       63.13
         20 |        371        3.71       66.84
         21 |        345        3.45       70.29
         22 |        381        3.81       74.10
         23 |        317        3.17       77.27
         24 |        262        2.62       79.89
         25 |        318        3.18       83.07
         26 |        331        3.31       86.38
         27 |        353        3.53       89.91
         28 |        339        3.39       93.30
         29 |        325        3.25       96.55
         30 |        275        2.75       99.30
         31 |         70        0.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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