How many people work in the primary industry(working with raw materials e.g farming, mining)?

I need help with my work. i need to know around how many people like % work in the primary industry.How many people work in the primary industry(working with raw materials e.g farming, mining)?
try to look on this site http://en.wikipedia.org/ there you find your looking for...How many people work in the primary industry(working with raw materials e.g farming, mining)?
At present it is about 4-5% only. The UK has a low proportion of people working in primary industry. This is partly because of mechanisation. Machinery has taken over jobs in the primary sector. Also, as primary resources have become exhausted (e.g. coal) The UK now imports a considerable amount of its non-renewable resources.