Fish prices and math

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0036731

I found this web page

This site shows how the prices of fish is rising now a days the main reason is because the population of the world is increasing, more and more people are eating fish than befour and is getting popular.

In japan, where i am from, we eat a lot of fish from long time ago, for us it is common to eat fish even in raw condition which is now very familiar to people all of the world called sushi and sashimi.

Because fish is more popular in the world and prices going up, it is becoming more difficult to eat fish even in Japan.