CREATE TABLE table_17503 ("Year" FLOAT, "Mens singles" CLOB, "Womens singles" CLOB, "Mens doubles" CLOB, "Womens doubles" CLOB, "Mixed doubles" CLOB)

How many years did Peter Mikkelsen win the Mens Singles?
SELECT COUNT("Year") FROM table_17503 WHERE "Mens singles" = 'Peter Mikkelsen'
SELECT COUNT("Year") FROM "table_17503" WHERE "Mens singles" = 'Peter Mikkelsen'