Complete the game and load up the same file or start a new one with the same file, every area you are in (eg Brinstar, Chozodia, Crateria...) Press START and look at your map, at the top left corner, there will be 3 icons, it will tell you how many there is and how many you got in that area, if you get all of the Energy Tanks in the Area, there will be a yellow tick next to the symbol on the map

This trick also works in Metroid : Fusion!