Frequencies for first 10,000 rows of painscale variable in nhamcsed2013 dataset :

 Pain scale |
     (0-10) |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |        502        5.02        5.02
    Unknown |      2,719       27.19       32.21
          0 |      2,234       22.34       54.55
          1 |         92        0.92       55.47
          2 |        295        2.95       58.42
          3 |        280        2.80       61.22
          4 |        380        3.80       65.02
          5 |        470        4.70       69.72
          6 |        476        4.76       74.48
          7 |        550        5.50       79.98
          8 |        828        8.28       88.26
          9 |        369        3.69       91.95
         10 |        805        8.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016