Do you only want to see 1 'year' (cell value) in each map? There are two ways to do this, I recommend via the symbology tab in the layer properties (right clik on layer, go to symbology): Remove or make the colours NULL for every year but the one you want (select in the window, right click and hit remove or double click on each little box and select the colour then set to Null).. if either of these sound likely I can expand with further instructions.