SEJONG -- South Korea's tax revenue fell 33.9 trillion won ($25.7 billion) in the first four months of the year compared with a year earlier, data showed Wednesday, as an economic slump weighed down on business activities. Tax revenue amounted to 134 trillion won during the January-April period, down from 167.9 trillion won tallied a year earlier, according to the Ministry of Economy and Finance. Last month, the government collected 46.9 trillion won in taxes, down 9.9 trillion won from the Read this story