If you want something like :
index 0, population, buildings, money, accidents,
index 1, population, buildings, money, accidents ... etc
Where index is the year. You can do easily do this by adding height to the array. Then right after you add the population you can save the other values with the action "array - set at XY" where X = the year-1 and Y the value index, (1 for building for example, 2 for money ...) and value = your value.
I just wake up so my index maybe false but you have the way to do this !