The table shows how a country's labour force is distributed between various industries. industry: agriculture, % of labour force: 8 industry: manufacturing, % of labour force: 20 industry: direct services, % of labour force: 20 industry: construction, % of labour force: 9 industry: mining, % of labour force: 3 industry: processing, % of labour force: 17 industry: commerce, % of labour force: 23 Which sector of the country's economy employs the most people?