TABLE 1.

Numbers of samples received from production sites.

Year	# of samples from sites with no signs of disease		# of samples from sites with evident signs of disease
	sera	swabs	sera	swabs
2014	−	100	−	100
2016	200	69	100	111
2017	300	95	293	70
2018	150	−	103	25
2019	−	−	225	100
2020	60	−	103	21
Total	710	264	824	427