CARDAMAG.DAT
Data file belonging to the GLM macro package of XploRe 3.0.
The data is from "Generalized Linear Models, 2nd Edition", McCullagh and 
Nelder (1989), Chapman and Hall, p. 298.
The data gives the average cost of claims for own damage (adjusted for
inflation) for privately owned, comprehensively insured cars in 1975.

The first column is an index for the Policyholder's age (in years):
  1  =  17-20,  2 = 21-24,  3 = 25-29,  4 = 30-34,
  5  =  35-39,  6 = 40-49,  7 = 50-59,  8 = >=60
The second column is an index for the car group (see McCullagh & Nelder):
  1  =  Group A,  2 = Group B,  3 = Group C,  4 = Group D
The third column is an index for the age of the car (in years):
  1  =  0-3,  2  =  4-7,  3  =  8-9,  4 = >=10
The fourth column gives the average cost of claims (in pounds sterling)
The fifth column gives the number of claims.