Table schema:
CREATE TABLE table_30133_1 (current_account_balance__percent_of_gdp_ VARCHAR, export_volume_of_goods_and_services__percent_change_ VARCHAR)

Question: What is the current account balance for an export volume of goods and service value of -4.2?
SQL: SELECT current_account_balance__percent_of_gdp_ FROM table_30133_1 WHERE export_volume_of_goods_and_services__percent_change_ = "-4.2"