CREATE TABLE table_64157 ("Year" FLOAT, "Tournament" TEXT, "Venue" TEXT, "Result" TEXT, "Event" TEXT, "Points" TEXT)

What average year has international meeting & national championships as the tournament?
SELECT AVG("Year") FROM table_64157 WHERE "Tournament" = 'international meeting & national championships'
SELECT AVG("Year") FROM "table_64157" WHERE "Tournament" = 'international meeting & national championships'