For the historians out there, here is a complete breakdown of the previous winners.
GRAMMAR (14)
1897-98-99, 1915-16, 1919-20-21-22, 1924*, 1929, 1949*, 1966-67
HIGH (5)
1946*, 1963, 1971-72*73
KINGS (28)
1890-91-92-93-94-95, 1901-02-03, 1910, 1913-14, 1917, 1924*, 1926-27*-28, 1934, 1951...