Refer to the following table and solve the questions based on it.
The following charts show the sector-wise percentage break-up of $ 650 billion, which is the GDP of the country with a population of 12 billion people. 70% of the population of the country constitutes its working population, engaged in the various sectors of the economy and contributing to the GDP.
Productivity is defined as the average amount contributed to the GDP per person in that group or sector.
What is the approximate difference in the number of people involved in the agriculture sector and the services sector?