Table 1.

Number of subjects with regard to sex and age

Sex	Age [years]
	8	9	10	11	12	13	14	15	16
boys	29	32	41	20	32	31	37	29	26
girls	35	36	28	22	29	25	23	27	22
total	64	68	69	42	61	56	60	56	48