SELECT MAX("San Javier Municipality (%)") FROM table_23468 WHERE "Language" = 'Aymara simi'
For language Aymara Simi, what was the maximum San Javier municipality percentage?
CREATE TABLE table_23468 (
    "Language" text,
    "Concepci\u00f3n Municipality (%)" real,
    "San Javier Municipality (%)" real,
    "San Ram\u00f3n Municipality (%)" real,
    "San Juli\u00e1n Municipality (%)" real,
    "San Antonio de Lomer\u00edo Municipality (%)" text,
    "Cuatro Ca\u00f1adas Municipality (%)" text
)