Please see the stats the number is increasing:-
And this is because more IIT and more IIM are established more Delhi University colleges are established. And all these institutions are made due to public demand ,keeping in mind that the number of eligible and capable candidates are increasing each year despite the increase in toughness level of respective entrance exams as well as board exams( for DU ). The race for a seat in a premier institution starts in early age so if you are aiming for any then start working now.