表２　イトウの月別匹数
月	1	2	3	4	5	6	7	8	9	10	11	12	総計
1994	0	0	0	2	9	6	0	0	0	4	11	0	32
1995	0	0	0	0	18	21	2	4	12	8	10	4	79
1996	0	0	0	2	4	20	10	6	5	7	14	1	69
1997	0	0	0	2	7	21	14	14	9	2	19	5	93
1998	0	0	1	3	19	23	17	13	10	4	3	1	94
1999	0	0	0	0	11	23	19	4	23	3	5	0	88
2000	0	0	0	1	17	20	19	8	27	2	10	0	104
2001	0	0	0	0	10	27	18	12	6	4	8	0	85
2002	0	0	0	1	21	24	6	13	24	7	2	2	100
2003	0	0	0	0	21	23	24	17	17	1	5	0	108
2004	0	0	0	0	10	31	18	13	11	13	3	0	99
2005	0	0	0	0	5	9	9	11	14	11	6	0	65
2006	0	0	0	0	1	11	22	9	11	3	1	0	58
2007	0	0	0	0	6	26	19	9	15	4	4	0	83
2008	0	0	0	0	7	23	13	22	14	11	2	1	93
2009	0	0	0	0	10	19	6	13	10	8	3	0	69
2010	0	0	0	0	8	15	12	15	12	2	4	0	68
2011	0	0	0	0	11	23	17	14	13	11	5	0	94
2012	0	0	0	0	13	32	25	20	15	13	2	0	120
2013	0	0	0	0	11	41	11	10	27	12	4	1	117
2014	0	0	0	0	17	20	10	23	23	11	6	1	111
2015	0	0	0	0	20	24	20	11	8	11	5	2	101
2016	0	0	0	0	17	17	14	9	16	9	3	0	85
2017	0	0	0	0	12	24	17	17	12	11	2	0	95
2018	0	0	0	0	14	24	15	17	13	12	7	0	102
2019	0	0	0	0	9	15	11	21	14	11	4	0	85
2020	0	0	0	0	15	13	13	10	15	6	3	0	75
2021	0	0	0	0	10	12	11	4	6	9	0	0	52
2022	0	0	0	0	4	9	7	5	9	11	3	0	48
2023	0	0	0	0	3	7	6	2	7	4	2	0	31
総計	0	0	1	11	340	603	405	346	398	225	156	18	2503