$2500 increased from last week for international ocean freight

Q：What's the 40'HQ cost to La Guair this week?

A: $13000 this week, and $15500 next week, it's really crazy。

Compare with $11500 at end of May, about 13% increased at the first week of June, next week is a 19.23% rate increase from 1st week. Why? 

The skyrocketing ocean freight has made our exports extremely difficult, and it has also led to a sharp increase in buyer costs. Only the shipping company has made a lot of money.