The file tuyns.dat contains 88 records from Appendix I of Breslow and Day
(1980).  These consist of grouped data from the Ille-et-Vilaine study
of esophageal cancer in relation to smoking, alcohol consumption and diet.
The contents are as follows:

      COL        VAR               RANGE/VALUES
    _______    ________________   ________________________________________

     1-2        Age group          1 = 25-34
                  (years)          2 = 35-44
                                   3 = 45-54
                                   4 = 55-64
                                   5 = 65-74
                                   6 = 75+

     3-4        Alcohol            1 =  0-39
                (gms/day)          2 = 40-79
                                   3 = 80-119
                                   4 = 120+

     5-6        Tobacco            1 =  0- 9
                (gms/day)          2 = 10-19
                                   3 = 20-29
                                   4 = 30+

     7-9        Cases              Number of esphogeal cancer cases

    10-12       Controls           Number of population controls

_____________________________________________________________________________
  Records with 0 cases and 0 controls have been deleted.