What films came out in the summer of...?

Just making an observation here. 

All big tentpoles to come out in summer of 2013:
Iron Man 3
Star Trek Into Darkness
Fast and Furious 6
After Earth
Man of Steel
World War Z
White House Down
The Lone Ranger
Pacific Rim
R.I.P.D.
The Wolverine
Elysium


Five years before....2008:
Iron Man
Speed Racer
The Chronicles of Narnia: Prince Caspian
Indiana Jones and the Kingdom of Crystal Skull
The Incredible Hulk
Hancock
The Dark Knight
The Mummy: Tomb of Dragon Emperor


Five years before... 2003:
X2: X-Men United
The Matrix Reloaded
2 Fast 2 Furious
The Hulk
Terminator 3: Rise of the Machines
Pirates of the Caribbean: Curse of the Black Pearl
Bad Boys II
Lara Croft Tomb Raider: Cradle of Life

Five years before... 1998:
Deep Impact
Godzilla
The X-Files
Armageddon
Lethal Weapon 4
The Mask of Zorro

1993:
Cliffhanger
Jurassic Park
Last Action Hero
The Fugitive



It used to be that you'd have a big budget action blockbuster tentpole per month in the summer. But now, there's one every week. It's really stupid, honestly. Why did we start making so many of them? It creates a cluster and, inevitably, a good amount will fail. A few of those 2003 ones are kinda in-betweens. Not exactly tentpoles, but they are films the studios spent a good amount of money on. But if May - early August is the bread and butter for major studios, why would you have 12 blockbuster films all coming out in a row like that? Some are bound to fail. There's fatigue. The movies that have been number 1 in the box office the past few weeks have been animated ones: Monsters University and Despicable Me. To me, that sounds like blockbuster fatigue. It's time to start spending money more wisely, Hollywood.