Table 4A.

Accuracy (mean %bias) of 6 Japanese manufacturers conducted by TC Certification Protocol for Manufacturers.

Manufacturer	Certification year for TC
	1996	1997	1998	2002	2004	2006	2008	2010	2012
A	0.6		−0.8	−0.4	−0.1	1.0	−0.3	−0.3	1.3
B	−1.2		−0.6	1.6	−0.4	1.4	1.0	−0.3	−0.1
C	1.0		−1.3	−1.0	0.6	−0.4	1.1	−0.1	−0.9
D	2.1	1.2		−1.1	−0.1	0.7	0.1	−0.5	0.5
E		−2.2		0.2	0.2	−0.2	1.8	0.5	−0.1
F		1.2		0.4	−0.4	0.0	0.5	0.3	0.0

Accuracy criterion: mean % bias ≦3% unit: %.