arr = Array();arr[0] = 'pricesDecember2010';arr[1] = 'pricesJanuary2011';arr[2] = 'pricesFebruary2011';arr[3] = 'pricesMarch2011';arr[4] = 'pricesApril2011';arr[5] = 'pricesMay2011';arr[6] = 'pricesJune2011';arr[7] = 'pricesJuly2011';arr[8] = 'pricesAugust2011';arr[9] = 'pricesSeptember2011';arr[10] = 'pricesOctober2011';arr[11] = 'pricesNovember2011';arr[12] = 'pricesDecember2011';arr[13] = 'pricesJanuary2012';arr[14] = 'pricesFebruary2012';arr[15] = 'pricesMarch2012';arr[16] = 'pricesApril2012';arr[17] = 'pricesMay2012';arr[18] = 'pricesJune2012';arr[19] = 'pricesJuly2012';arr[20] = 'pricesAugust2012';