Table 1.

Infection spread between and within age-groups

		Age groups of referrals
		0–6	7–13	14–18	19–24	25–34	35–44	45–54	55–64	65–74	75–84	85	NA	Row total
A. Absolute frequencies by referee count
Age	0–6	30	20	2	4	56	84	12	18	12	1	1	2	242
groups	7–13	41	39	18	6	24	146	62	7	12	8	4	3	370
of	14–18	13	30	41	17	7	85	121	9	6	6	3	4	342
referees	19–24	25	10	36	177	127	61	254	44	19	12	2	1	768
	25–34	564	100	29	138	1,042	328	287	268	63	15	4	19	2,857
	35–44	767	837	276	96	321	1,066	301	186	202	40	10	23	4,125
	45–54	116	313	340	312	230	273	844	185	96	97	34	15	2,855
	55–64	45	55	38	59	140	135	143	295	66	39	30	5	1,050
	65–74	28	35	21	12	38	110	80	51	123	19	13	3	533
	75–84	3	8	6	7	7	20	49	13	23	27	8	0	171
	85	0	3	1	2	6	4	12	11	9	8	4	1	61
	NA	0	0	1	0	0	0	2	0	0	0	0	0	3
	Column total	1,632	1,450	809	830	1,998	2,312	2,167	1,087	631	272	113	76	13,377
B. Absolute frequencies by referee count
Age	0–6	12.4%	8.3%	0.8%	1.7%	23.1%	34.7%	5.0%	7.4%	5.0%	0.4%	0.4%	0.8%	100.0%
groups	7–13	11.1%	10.5%	4.9%	1.6%	6.5%	39.5%	16.8%	1.9%	3.2%	2.2%	1.1%	0.8%	100.0%
of	14–18	3.8%	8.8%	12.0%	5.0%	2.0%	24.9%	35.4%	2.6%	1.8%	1.8%	0.9%	1.2%	100.0%
referees	19–24	3.3%	1.3%	4.7%	23.0%	16.5%	7.9%	33.1%	5.7%	2.5%	1.6%	0.3%	0.1%	100.0%
	25–34	19.7%	3.5%	1.0%	4.8%	36.5%	11.5%	10.0%	9.4%	2.2%	0.5%	0.1%	0.7%	100.0%
	35–44	18.6%	20.3%	6.7%	2.3%	7.8%	25.8%	7.3%	4.5%	4.9%	1.0%	0.2%	0.6%	100.0%
	45–54	4.1%	11.0%	11.9%	10.9%	8.1%	9.6%	29.6%	6.5%	3.4%	3.4%	1.2%	0.5%	100.0%
	55–64	4.3%	5.2%	3.6%	5.6%	13.3%	12.9%	13.6%	28.1%	6.3%	3.7%	2.9%	0.5%	100.0%
	65–74	5.3%	6.6%	3.9%	2.3%	7.1%	20.6%	15.0%	9.6%	23.1%	3.6%	2.4%	0.6%	100.0%
	75–84	1.8%	4.7%	3.5%	4.1%	4.1%	11.7%	28.7%	7.6%	13.5%	15.8%	4.7%	0.0%	100.0%
	85	0.0%	4.9%	1.6%	3.3%	9.8%	6.6%	19.7%	18.0%	14.8%	13.1%	6.6%	1.6%	100.0%
	NA	0.0%	0.0%	33.3%	0.0%	0.0%	0.0%	66.7%	0.0%	0.0%	0.0%	0.0%	0.0%	100.0%
	Column total	12.2%	10.8%	6.0%	6.2%	14.9%	17.3%	16.2%	8.1%	4.7%	2.0%	0.8%	0.6%	100.0%