Table 2.

Distribution of sampling by month. Period 2008–2017 (mean values for the whole period are shown).

Month	2008–2017		2008		2009		2010		2011		2012		2013		2014		2015		2016		2017
	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
JANUARY	20	3	0	0	0	0	4	9	3	4	6	10	0	0	1	1	0	0	4	5	2	2
FEBRUARY	60	8	5	10	5	6	8	19	6	8	16	26	6	7	4	5	10	13	0	0	0	0
MARCH	99	14	7	13	7	9	9	21	20	27	14	23	4	4	12	15	10	13	6	7	10	11
APRIL	97	13	8	15	11	14	13	30	8	11	2	3	10	11	12	15	12	15	9	10	12	14
MAY	70	10	5	10	9	11	7	16	14	19	0	0	8	9	2	3	8	10	15	17	2	2
JUNE	43	6	3	6	3	4	2	5	4	5	6	10	7	8	2	3	5	6	5	6	6	7
JULY	53	7	6	12	10	13	0	0	4	5	0	0	4	4	8	10	7	9	10	12	4	5
AUGUST	56	8	2	4	2	3	0	0	2	3	6	10	4	4	6	8	2	3	16	19	16	18
SEPTEMBER	70	10	4	8	8	10	0	0	8	11	11	18	14	16	6	8	11	14	6	7	2	2
OCTOBER	58	8	7	13	14	18	0	0	0	0	1	2	10	11	10	13	6	8	0	0	10	11
NOVEMBER	72	10	3	6	10	13	0	0	0	0	0	0	14	16	9	11	5	6	13	15	18	20
DECEMBER	35	5	2	4	0	0	0	0	6	8	0	0	8	9	7	9	4	5	2	2	6	7
Total	733	100	52	100	79	100	43	100	75	100	62	100	89	100	79	100	80	100	86	100	88	100