For a company to post a job is big deal. It many managers agree that the new job is cost justified based on needed future workload and that there is an agreement to monies should be allocated to fund the position.
In slow economies, sales and customer service are the primary categories needed.
Companies need cash and new customers. In growth economies, all categories are growing.
It appears we are in a mature economy since sales, customer service, marketing job postings are down and accounting and finance are half the postings.