That's because you are not part of our common market
Hmmm.... When you say 'economy', I'm not wholly sure what you mean. When I look at the graph of your assets, there has been a steady climb for some time.
On the other hand, your profit/loss account is not as good as I would wish. You lost 2Bn - assuming you didn't account for your beginner's bonus. You are not covering your governmental costs with the profits/taxes from your corporations, something I advocate presidents should aim to achieve in my advice on our common market/Fed forum (
http://canadasr.forumcircle.com/portal.php).
As for the cash, which is where I suspect you mean your economy has dropped, I think it is because you have overall lost out owing to closing a corporation and opening another. There is a net cash loss in that procedure.
Seriously, we are happy for active players to come and learn game economics with us in our common market - with the added bonus of guaranteed supplies and sales! Come and try us out