CREATE TABLE table_71766 ("Year" FLOAT, "Men's singles" CLOB, "Women's singles" CLOB, "Men's doubles" CLOB, "Women's doubles" CLOB, "Mixed doubles" CLOB)

When did Julie Still first win Women's singles?
SELECT MIN("Year") FROM table_71766 WHERE "Women's singles" = 'julie still'
SELECT MIN("Year") FROM "table_71766" WHERE "Women's singles" = 'julie still'