Description of normalization for nutrition information panel in 2008 and 2010 (N2008 = 1364, N2010 = 1933a).

Note:a there were 5 and 4 nutrition facts label blocked in 2008 and 2010, respectively, so the sample decreased to 1364 and 1933.b the regulation defined the expression format for the nutrition component (e.g., expression units, nutrient reference value(NRV), numerical form and rounding interval), “total qualified ” means fulfill all above four requirements.