CREATE TABLE table_70560 ("Year" FLOAT, "Division" FLOAT, "League" TEXT, "Regular Season" TEXT, "Playoffs" TEXT, "Open Cup" TEXT)

What is the year when they did not qualify for the playoff and the Regular Season shows as 10th?
SELECT COUNT("Year") FROM table_70560 WHERE "Playoffs" = 'did not qualify' AND "Regular Season" = '10th'
SELECT COUNT("Year") FROM "table_70560" WHERE "Playoffs" = 'did not qualify' AND "Regular Season" = '10th'