CREATE TABLE table_15321 ("Version" TEXT, "Code name" TEXT, "Release date" TEXT, "API level" FLOAT, "Distribution" TEXT)

with Distribution of 10.6% what is the average api level?
SELECT AVG("API level") FROM table_15321 WHERE "Distribution" = '10.6%'
SELECT AVG("API level") FROM "table_15321" WHERE "Distribution" = '10.6%'