Like many have already said 5 aircraft carriers is illogical. actually, im my opinion, quite frankly, stupid.
do you any idea the costs to maintain an aircraft carrier alone? Not only that, every second that an aircraft carrier leaves port, it needs to be surrounded by a battle group. this only effects the cost of operation even more.
if by some chance, god forbid, an aircraft carrier is destroyed, its a HUGEEE loss. Strategically yes, but more importantly, economically and emotionally.
for me, ideal carrier numbers would be 2-3. We do not need aircraft carriers to project power. 2 in operation all the time needed.