aleatory assignment of quotas

[Sebastián Daza]

dear,
I write them because I need to assign quotas (sex and age) for a sample in an aleatory way. The format of the database in spss is the following one:

county	cluster (zip area)	cases for zip area	man 18-34	man 35-54	man 55 or more	women 18-34	women 35-54	women 55 o more
1	1	5
1	2	5
1	3	5
1	4	5
1	5	5
1	6	5

In each cluster, I need to assign as maximum five interviewed, according to the distribution of the quotas.

Man 18-34	7
Man 35-54	2
Man 55 or more	3
Women 18-34	8
Women 35-54	4
Women 55 o more	6

What I need is that the distribution of the quotas is aleatory, the only condition is that the total of each column (ex. man 18-34) is same to the number of quota (ex. 7) and the each row is same to 5 (total of having interviewed by zip area). An example would be:

county	cluster (zip area)	cases for zip area	man 18-34	man 35-54	man 55 or more	women 18-34	women 35-54	women 55 or more
1	1	5	1	0	0	1	2	1
1	2	5	0	1	0	...	...	...
1	3	5	2	0	1
1	4	5	1	0	1
1	5	5	3	1	1
1	6	5	0	0	0

Does somebody know how it could assign aleatory quotas in spss?  some suggestion of how to distribute the quotas? Thank you for the help.