Qual é o saldo da conta corrente para um volume de exportação de bens e serviços de valor de -4,2?
CREATE TABLE table_30133_1 (current_account_balance__percent_of_gdp_ VARCHAR, export_volume_of_goods_and_services__percent_change_ VARCHAR)
SELECT current_account_balance__percent_of_gdp_ FROM table_30133_1 WHERE export_volume_of_goods_and_services__percent_change_ = "-4.2"