The hash looks something like:
$global{'title'}='Report for today'
$global{'data 1'}{title}='My data 1 title'
$global{'data 1'}{data}= (ref to hash)
$global{'data 1'}{footer}='My footer'
$global{'data 2'}{title}='My data 2 title'
$global{'data 2'}{subtitle}='Data 2 subtitle'
$global{'data 2'}{data}= (ref to hash)
$global{'data 2'}{'data percentages'}= (ref to hash)
$global{'data 2'}{'data raw'}= (ref to hash)
$global{'data 2'}{footer}='Footer for data 2'
and so on..