NFL - Is home team advantage dropping?

[psuasskicker]

A friend of mine put this together. Apologize if formatting is off...

...... W - L

2007 64 - 51

2006 136 - 120

2005 151 - 105

2004 145 - 111

2003 157 - 99

2002 148 - 107

2001 136 - 112

2000 138 - 110

1999 146 - 102

1998 151 - 89

1997 145 - 95

1996 149 - 91

1995 144 - 96

Totals 1810 - 1288, 58.4%

Last 5 years 653 - 486, 57.3%

Last 3 years 351 - 276, 56.0%

May not be a huge shift, but seems like there is one. Two questions:
- Any adjustments to be made from this over the coming years?
- What could be causing this? The only thing we could come up with is cushier stadiums and better conditions for visitting teams, but that doesn't seem like it'd cover that much...

- C -