CREATE TABLE table_33768 ("Chapter" TEXT, "Chartered" TEXT, "School" TEXT, "State" TEXT, "Status" TEXT, "Charter Range" TEXT)

What state had an active chapter from 1906-1991?
SELECT "State" FROM table_33768 WHERE "Charter Range" = '1906-1991'
SELECT "State" FROM "table_33768" WHERE "Charter Range" = '1906-1991'