It is hard to believe but I thought this was worthy of your time. My own neighborhood was hit in about 2008 as the prices rose. Here is the slide presentation from MSN Money.
http://money.msn.com/exchange-traded-fund/10-hot-commodities-thieves-are-stealing-brush.aspx?cp-documentid=6848686
Knowing what is going on in your neighborhood is important! Judy