Calculate the percentage of variance for the below chart: 
Definitions:
Major Ionization State
The predominant form of a molecule at a given pH level, determined by the molecule's dissociation into ions in solution.
Histidine
An essential amino acid important in the growth and repair of tissues, often mentioned in the context of protein synthesis.
pKa Values
A quantitative measure of the strength of an acid in solution, defined as the negative logarithm of the acid dissociation constant (Ka).
pH
A measure of the hydrogen ion concentration in a solution, reflecting its acidity or basicity.
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