install.php

<?php

$installer = $this;

$installer->startSetup();

for ($i = 2015; $i <= 2020; $i++)
{
    $setup = Mage::getModel('customer/entity_setup', 'core_setup');
    $setup->addAttribute('customer', "kid_$i", array(
        'type'             => 'int',
        'input'            => 'text',
        'label'            => "KID $i",
        'global'           => 1,
        'backend'          => '',
        'visible'          => 1,
        'required'         => 0,
        'user_defined'     => 1,
        'default'          => '0',
        'visible_on_front' => 1,
    ));

    Mage::getSingleton('eav/config')
        ->getAttribute('customer', "kid_$i")
        ->setData('used_in_forms', array('adminhtml_customer'))
        ->save();
}

$installer->endSetup();