Multidimensional array read-out in view

[eluser]Unknown[/eluser]
When I output print_r($data);

I get:

Code:

Array
(
    [view] => factuur_print_view
    [vars] => Array
        (
            [voornaam] => Sandy
            [achternaam] => Cohen
            [adres] => Somefancystreet 69
            [gemeente] => Orange County
            [tel] => 1000
            [mail] => [email protected]
            [stad] => California
            [postcode] => 17459
            [factuurnummer] => 1
            [datum] => 2007
            [betaald] => 1
            [0] => Array
                (
                    [id] => 1
                    [factuurnummer] => 1
                    [referentienummer] => ee
                    [omschrijving] => dfds
                    [aantal] => 2
                    [eenheidsprijs] => 10
                )

            [1] => Array
                (
                    [id] => 2
                    [factuurnummer] => 1
                    [referentienummer] => fgg
                    [omschrijving] => fdgf
                    [aantal] => 8
                    [eenheidsprijs] => 20
                )

        )

    [return] =>

My question is, how do I access [0] and [1] and put them in a loop?