Why did the Indian Rupee depreciate so much against the US Dollar?

The availability or rather the supply of the US Dollar in the Indian markets is pretty limited. Because of uncertainty in the global economic scenario, foreign investors (especially from USA) have turned net-sellers and USD Inflows into the country has fallen sharply. The US dollars into the Indian economy by the FII's (Foreign Institutional Investors) not only guides the movement of the Indian Stock Markets, it also is a potent force that can determine the exchange rate movement of the Indian Rupee. The synopsis of this FII situation is as follows:

"If there is a net inflow of money (USD) from FII's the rupee strengthens or appreciates against the US Dollar. When there are net outflows, it depreciates"

For Example: During 2010, there were record inflows of funds from FII's into the Indian system and hence the Rupee was very strong. Remember the days when the Rupee was around 42-43 rupees per US Dollar??? Now in 2011, FII's are withdrawing their funds and hence the value of the rupee is depreciating