在php中循环增加5

I want to display some number in a dropdown options with the increment 5 which will be started to 5 and ended at 1005. The result should be 5, 10, 15, .... 1000, 1005.

So I wrote the loop as

<?php for ($i=5; $i < 1005; $i++) { ?>
    <option value = "<?php echo $i; ?>"><?php echo $i; ?></option>  
<?php } ?>

But it gives me as 5,6,7,.... . How can I resolve it?

<?php for ($i=5; $i < 1005; $i+=5) { ?>
    <option value = "<?php echo $i; ?>"><?php echo $i; ?></option>  
<?php } ?>

$i+=5 <-- This is the only change.

How about this?