The following is a distribution of monthly commissions:

Monthly Commissions Class Frequencies

$600 - $7993

$800 - $9997

$1,000 - $1,19911

$1,200 - $1,39922

$1,400 - $1,59940

$1,600 - $1,79924

$1,800 - $1,9999

$2,000 - $2,1994

Referring to the table above, what is the relative frequency of those salespersons that earn more than $1,599?