World's biggest employers

America's defence department had 3.2m people on its payroll last year, equivalent to 1% of the country's population. China, the world's most populous nation and a big military spender, employs 2.3m people in its armed forces. And the number of people working for the National Health Service in England is equivalent to over 2.5% of the country's population. The three private companies are Walmart, McDonald's and Taiwan's Hon Hai Precision Industry Company, a subsidiary of which is Foxconn, a secretive electronics manufacturer.