By The Numbers

The new Forbes 400, by the numbers --

Oldest member       : John Simplot, 98
Youngest member     : John Arnold, 33
Average age         : 65
Number never married: 11
Avg number of kids  : 3.2
Minimum net worth   : $1.3 Billion
Average net worth   : $3.8 Billion
Collective net worth: $1.54 Trillion
Entirely self-made  : 270
Entirely inherited  : 74
Number of women     : 39
California residents: 88
New York residents  : 73
NY City residents   : 64

Number of billionaires with not enough money to make the list : 84