CREATE TABLE table_61155 ("Year" FLOAT, "Competition" TEXT, "Venue" TEXT, "Position" TEXT, "Notes" TEXT)

Which Year has a Competition of european championships, and Notes of 66.81 m?
SELECT SUM("Year") FROM table_61155 WHERE "Competition" = 'european championships' AND "Notes" = '66.81 m'
SELECT SUM("Year") FROM "table_61155" WHERE "Competition" = 'european championships' AND "Notes" = '66.81 m'