Table 1.

Frequency distribution of the number of cases in the families

Number of cases	Population of families												Total
	1	2	3	4	5	6	7	8	9	10	11	13
0	27	49	80	98	145	88	47	18	16	3	2	0	573
1	0	5	8	23	42	23	16	3	7	1	0	1	129
2		0	3	6	12	6	3	3	2	1	0	0	36
3			0	2	5	1	2	0	1	0	0	0	11
4				0	0	1	0	0	0	1	0	0	2
5					0	0	0	0	0	0	0	0	0
6						0	0	0	0	0	0	0	0
7							0	0	0	0	0	0	0
8								0	0	0	0	0	0
9									0	0	0	0	0
10										0	0	0	0
11											0	0	0
12												0	0
13													0
Number of households	27	54	91	129	204	119	68	24	26	6	2	1	751