How much for each ribbon?

Is there a list that shows what it takes to get each ribbon? Like how many kills for the Combat ribbon I, II, and III? How many assists for the Wingman ribbons? etc for the other ribbons. Would also be nice to be able to see the progression towards each ribbon level mid game. Say, if you have all 3 combat ribbons but only 1 or 2 of another ribbon, you could change you play style to focus on getting the other ribbons to level 3.