How much money was spent on home solar systems in 2009?



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    The international market for solar photovoltaic panels was $12.9 billion in 2009.  This was a decline from 2008, which reported $15.9 billion in revenue.  This was due to the excess supply was generated from increasing popularity in 2008, but demand decreased due to a struggling economy in 2009.  iSuppli, a market research firm predicts pricing decline could increase the market sales and demand

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