CREATE TABLE table_204_859 (id DECIMAL, "year" DECIMAL, "seniors  ( trood award & rodda medal ) " TEXT, "reserves  ( rex hartley medal ) " TEXT, "under 18's  ( bruce wilkinson medal ) " TEXT, "under 16's  ( shaw/carter medal ) " TEXT)

what is the total of years on this chart
SELECT COUNT("year") FROM table_204_859
SELECT COUNT("year") FROM "table_204_859"