Are movie run times increasing?

I've worked in a movie theatre for years and been a fan of movies for much longer.  I have never really paid attention to movie run times in the past, they didn't really effect me.  If a movie was abnormally long, I would take note, but I didn't really care otherwise.  Once I started being a projectionist, I soon began to care.  The longer the movie, the longer I had to stay at night after later shows.  This works both ways though, the longer I have to stay, the more I get paid.

Anyway, I began thinking about this more and more.  I honestly feel like movies have gotten much longer in the last five years.  Maybe it is just that the more memorable movies are getting longer.  Maybe action scenes in movie are just getting longer and more frequent.  Is there a pattern here?  I've decided to look into it further.

First, I'm just going to list the top box office films for a few years and their run times.  By the way, I do want to add I'm not going to be looking into any article similar to this, I want to discover all the information on my own!

1999

1. Star Wars: Episode 1 - 133 minutes
2. The Sixth Sense - 107
3. Toy Story 2 - 92
4. Austin Powers: The Spy Who Shagged Me - 95
5. The Matrix - 136

1999 Average: 1 hour 52 minutes

2000

1. How the Grinch Stole Christmas - 104 minutes
2. Cast Away - 143
3. Mission Imposisble II - 123
4. Gladiator - 155
5. What Women Want - 127

2000 Average: 2 hours 10 minutes

2001

1. Harry Potter and the Sorcerer's Stone - 153 minutes
2. The Lord of the Rings: Fellowship of the Ring - 178
3. Shrek - 90
4. Monsters Inc. - 90
5. Rush Hour 2 - 90

2001 Average: 2 hours 0 minutes

2002

1. Spider-Man - 120 minutes
2. Lord of the Rings: The Two Towers - 179
3. Star Wars: Episode II - 132
4. Harry Potter and the Chamber of Secrets - 161
5. My Big Fat Greek Wedding - 95

2002 Average: 2 hours 17 minutes

2003

1. Lord of the Rings: The Return of the King - 200 minutes
2. Finding Nemo - 104
3. Pirates of the Caribbean: The Curse of the Black Pearl - 135
4. The Matrix Reloaded - 138
5. Bruce Almighty - 101

2003 Average: 2 hours 15 minutes

2004

1. Shrek 2 - 93 minutes
2. Spider-Man 2 - 127
3. The Passion of the Christ - 126
4. Meet the Fockers - 114
5. The Incredibles - 115

2004 Average: 1 hour 55 minutes

2005

1. Star Wars: Episode III - 146 minutes
2. The Chronicles of Narnia: The Lion, the Witch, and the Wardrobe - 132
3. Harry Potter and the Goblet of Fire - 143
4. War of the Worlds - 117
5. King Kong - 187

2005 Average: 2 hours 25 minutes

2006

1. Pirates of the Caribbean: Dead Man's Chest - 151 minutes
2. Night at the Museum - 108
3. Cars - 116
4. X-Men: The Last Stand - 104
5. The Da Vinci Code - 149

2006 Average: 2 hours 6 minutes

2007

1. Spider-Man 3 - 140 minutes
2. Shrek the Third - 92
3. Transformers - 143
4. Pirates of the Caribbean - 168
5. Harry Potter and the Order of the Pheonix - 139

2007 Average: 2 hours 16 minutes

2008

1. The Dark Knight - 150 minutes
2. Iron Man - 126
3. Indiana Jones and the Kingdom of the Crystal Skull - 120
4. Hancock - 92
5. WALL-E - 97

2008 Average: 1 hour 57 minutes

2009

1. Avatar - 160 minutes
2. Transformers: Revenge of the Fallen - 144
3. Harry Potter and the Half Blood Prince - 153
4. The Twilight Saga: New Moon - 130
5. Up - 96

2009 Average: 2 hours 16 minutes

2010

1. Toy Story 3 - 103 minutes
2. Alice in Wonderland - 109
3. Iron Man 2 - 125
4. The Twilight Saga: Eclipse - 124
5. Harry Potter and the Deathly Hallows Part I - 150

2010 Average: 2 hours 2 minutes

2011

1. Harry Potter and the Deathly Hallows Part 2 - 130 minutes
2. Transformers: Dark of the Moon - 154
3. The Twilight Saga: Breaking Dawn Part I - 108
4. The Hangover Part II - 102
5. Pirates of the Caribbean: On Stranger Tides - 137

2011 Average: 2 hours 6 minutes

2012

1. The Avengers - 142 minutes
2. The Dark Knight Rises - 165
3. The Hunger Games - 142
4. Skyfall - 143
5. The Hobbit: An Unexpected Journey - 166

2012 Average: 2 hours 32 minutes

Okay, so at first this appears to destroy my theory.

The chart here kind of show it might be increasing, but not enough for anyone to care.  Damn Pixar movies rae bringing it way down!  I'm going to keep looking into this though!  I'm convinced their is a correlation here somewhere.  More to come.