South Korea\'s national debt, including its potential and contingent liabilities, nearly doubled over the past seven years, a government report showed Tuesday. The national debt \"in a broad sense\" stood at 1,848.4 trillion won (US$1.62 trillion) at the end of last year, up from 934.4 trillion won tallied at the end of 2003, according to the report submitted to Rep. Lee Hahn-koo of the ruling Grand National Party ahead of a parliamentary audit.