Question: What is the average year that the USD exchange of ￥88.54 had a gross domestic product larger than 477327134?
SQL: SELECT AVG("Year") FROM "2-15578-1" WHERE "US dollar exchange" = '￥88.54' AND "Gross domestic product" > 477327134.0;

Question: How many years did the USD Exchange have ￥225.82 and a gross domestic product larger than 240707315?
SQL: SELECT COUNT("Year") FROM "2-15578-1" WHERE "US dollar exchange" = '￥225.82' AND "Gross domestic product" > 240707315.0;