The purpose of this site, and other Stack Exchange sites, is to gain knowledge or share knowledge, by asking or answering questions - not to acquire reputation points. This isn't a game like Candy Crush, where the aim is to accumulate points.
There is no specific pattern or average trend for acquiring reputation. It depends on how many questions have been asked during a specific period of time and how many questions anyone can answer. Not everyone has the knowledge to answer all the questions asked, or the time.
Some of our members may only be competent to answer questions about weather and climate, others only about geology, some about geology and weather and climate.
The other things that are important are, are the questions valid for the site and worthy of its members to answer. Likewise, the quality of answers is one factor that determines the number of up votes an answer receives, in addition to the number of members qualified to review and vote on the answer.