According to the graph below, the world population reached 7 billion around what year? 
Definitions:
The Product
Refers to any item or service that is created through a process and is offered for sale to customers.
Productivity
The efficiency with which an organization or individual converts inputs into outputs, often measuring how much work is done in a given amount of time.
WMS
A Warehouse Management System, software that supports the day-to-day operations in a warehouse by managing and optimizing inventory, picking processes, and shipping.
Database
An organized collection of data, generally stored and accessed electronically from a computer system, designed for efficient retrieval and management of information.
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