	<28 days			28 days - 1 yr		1 - 5 yrs		5 - 10 yrs		10 - 18 yrs
Year	Positive	Negative		Positive	Negative	Positive	Negative	Positive	Negative	Positive	Negative
2008	131	207		38	166	52	172	29	74	6	30
2009	58	287		14	128	20	200	7	108	6	78
2010	19	372		5	154	8	160	2	85	0	67
2011	28	420		6	161	7	197	4	101	1	89
2012	39	530		7	287	8	342	3	135	3	89
2016	5	2		0	0	0	1	0	0	0	0
2017	6	4		4	13	10	21	2	5	1	9
2018	72	65		24	51	40	46	15	26	19	41
2019	86	50		32	28	46	59	9	38	21	42
2020	22	19		10	24	21	36	8	8	8	23
Total	466		1956	140	1012	212	1234	79	580	65	468
X², p	515.528, 0.000			165.808, 0.000		250.230, 0.000		95.836, 0.000		85.143, 0.000