/*
Distribution of discovered Downs' syndrome cases and of total 
live births by maternal age and birth order, Michigan, 1950-
1964.

Data Items

1 AgeL        Lower limit of Maternal Age category
              (limit for "under 20" arbitrarily set to 15)


2 AgeU        Upper limit of Maternal Age category
              (limit for "over 40" arbitrarily set to 50)

3 BirthOrd    Birth Order
              (1=1, 2=2, 3=3, 4=4, 5 = 5 or higher)

4 Cases       Number of cases

5 Births      Number of Live Births

-----------

Taken from

Table 14.4, page 249 of Fleiss J "Statistical Methods for 
Rates and Proportions" 2nd Edition, Wiley, New York, 1981.

Fleiss gives the source of the data as:

Stark CR and Mantel N (1966) "Effects of maternal age and 
birth order on the risk of mongolism and leukemia" J Natl 
Cancer Inst 37 687-698.

*/

DATA a;

INPUT  
  
AgeL
   AgeU   
     BirthOrd   

            Cases   Births ;
LINES;
15   19   1   107   230061
15   19   2    25    72202
15   19   3     3    15050
15   19   4     1     2293
15   19   5     0      327
20   24   1   141   329449
20   24   2   150   326701
20   24   3    71   175702
20   24   4    26    68800
20   24   5    8     30666
25   29   1    60   114920
25   29   2   110   208667
25   29   3   114   207081
25   29   4    64   132424
25   29   5    63   123419
30   34   1    40    39487
30   34   2    84    83228
30   34   3   103   117300
30   34   4    89    98301
30   34   5   112   149919
35   39   1    39    14208
35   39   2    82    28466
35   39   3   108    45026
35   39   4   137    46075
35   39   5   262   104088
40   50   1    25     3052
40   50   2    39     5375
40   50   3    75     8660
40   50   4    96     9834
40   50   5   295    34392
;
PROC PRINT;
RUN;