Your link is broken, but I'll do the research for you:
"How Much Could I Receive?
Allotments for households in the 48 contiguous states and the District of Columbia.
The amount of benefits the household gets is called an allotment. The net monthly income of the household is multiplied by .3, and the result is subtracted from the maximum allotment for the household size to find the household's allotment. This is because SNAP households are expected to spend about 30 percent of their resources on food.
(October 2012 through September 2013)
People in Household Maximum Monthly Allotment
1 $ 200
2 $ 367
3 $ 526
4 $ 668
5 $ 793
6 $ 952
7 $ 1,052
8 $ 1,202
Each additional person $ 150
$668 is the maximum possible benefit, not the amount everyone gets.