4 ms·http://www.vanguard.com/pub/Pdf/sai040.pdf http://www.vanguard.com/pub/Pdf/sai040.pdf Page 45.by saryant 11y agohttp://www.vanguard.com/pub/Pdf/sai040.pdf http://www.vanguard.com/pub/Pdf/sai040.pdf Page 45.