All industry is made up of four sectors that are a linked together like a chain: primary, secondary, tertiary and quaternary industry. Industries in the primary and secondary sectors are the ...

All industry is part of a chain that starts with primary industry: the production or extraction of raw materials, like agricultural products or mining; and secondary industry: the processing of ...

According to the census results, approximately 164 million people were employed in the secondary industry by the end of 2023, a decrease of 4.8 percent, or 8.26 million people, compared to 2018 ...