Frequencies for first 10,000 rows of painscale variable in nhamcsed2011 dataset :

 Pain scale |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |        357        3.57        3.57
    Unknown |      1,614       16.14       19.71
          0 |      2,463       24.63       44.34
          1 |        151        1.51       45.85
          2 |        325        3.25       49.10
          3 |        332        3.32       52.42
          4 |        465        4.65       57.07
          5 |        648        6.48       63.55
          6 |        618        6.18       69.73
          7 |        676        6.76       76.49
          8 |        995        9.95       86.44
          9 |        457        4.57       91.01
         10 |        899        8.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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