Table 4: Fraction of irregular Stokes V profiles of the Fe  I 15 648 and 6302 Å lines with reduced resolution as a function of $\langle B\rangle$. Only the profiles with amplitudes 3 times above the noise of $3 \times 10^{-4} I_{\rm c}$ are considered. The last two columns give the fraction of profiles above the threshold in the infrared and the visible.
$\langle B\rangle$ [G] Fe  I 15 648 Fe  I 6302 N15 648 N6302
10 22% 21% 36% 31%
20 29% 30% 64% 54%
30 26% 29% 86% 88%
80 19% 28% 99% 100%
140 16% 17% 100% 100%


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