I'm creating a form, that has a drop down box 'number of drivers' which has up to 4 options (i.e. 1 driver,2 drivers, 3 drivers & 4 drivers). 

When I select 2 drivers, 2 lots of fields pop up so each driver can enter their separate details, I've done this using the 'Show this when number of drivers is 2'. Now I want to do the same, but when I select 3 drivers I want all 3 lots of fields to pop up & when I select 4 all 4 fields to pop up.

Does anyone know how to do this ?

Cheers
Josh