CREATE TABLE table_56393 ("Product" CLOB, "2004" CLOB, "2003" CLOB, "2002" CLOB, "2001" CLOB)

What is the 2002 statistic for the product that had 452,000 tonnes in 2001?
SELECT "2002" FROM table_56393 WHERE "2001" = '452,000 tonnes'
SELECT "2002" FROM "table_56393" WHERE "2001" = '452,000 tonnes'