Average Cost of Eating Out!

Average Cost of Eating out over the years, indicating the treats I gave and got:

First Year of Engg : 100 bucks for 2
Second Year of Engg : still 100 bucks for 2
Third Year of Engg: 200 bucks for 2
Final Year of Engg: 250-300 bucks for 2

And now?
easily above 400 bucks ......
What does this indicate ? :)