it's 2015 now but still, I can't find any USD bills of 2013 series. All my bills are 2009 series (not even 2009A series). I'm looking for 100 dollar denomination. what's the latest series for USD bills? thanks
Your question seems out of place at an Economics forum.
This site gives you information about US paper currency releases: http://www.uspapermoney.info/general/chron_s.html